Unraid change cache pool I accidentally changed the pool size of my xfs-encrypted cache to 2, didn't realize the mistake and started the array. Then having to rebuild the mirror again. Format the drive Stop the array Change the format type to what you want Start the array Format the drive To add disks to the cache (pool) in your array, perform the following steps: Stop the array. Start the array. 1 which seemed fine as well but when my server restarted, the array would now be stuck at "Mounting" the cache pool. Mover takes no action for this share. Quote; Kilrah. Stopped the array, disabled the cache drives, pull the cache drives, started the array. no restart or shutdown. I moved everything off the Cache. this is the relevant part of diag Hello, I'm trying to setup a new server with 23 cache drives using a 9206-16 (flash to IT-mode with latest firmware) and on board sata ports. 0 and had switched my cache pool (2x2TB SSDs) to ZFS (mirrored). Current configuration is a 3 SSD's in a BTRFS Raid5 Pool. In that pool, I had about 11,175 mkv files, among which only 80 mkv files are healthy (in tdarr). To clear the drive, set all the shares currently using the cache to cache:yes, stop I am building an unraid server right now and I am trying to figure out how to setup my Cache Pools. One of the drives show SMART errors and will have to be RMA:ed. The other disk (WDC NVME SSD) was still part of the cache pool. TL;DL: Hi everyone. stellen. That means your drives will give you a 500GB mirrored cache. You can have multiple drives in a single cache pool. (BTRFS copy was successful) but instead of simply unassigning the drive (and keep the slots to 2) to let unraid rebuild the cache, I changed the the slots to 1, which caused some issues. The overall process of replacing a cache drive looks something like Make sure the cache is setup in RAID1. let pool rebuild (will take some time) after pool rebuilds on to new drive, shut down array. Do I just add the 2 nvme disks to the Docker_Cache pool and then change the file type to bt Old Cache drive SSD 1T I added a second drive to the cache pool nvme 2TB Raid1, And let it clone it self. New - DARK - Invision (Default) New You can use a single-drive cache 'pool' for the torrents if you don't mind no redundancy, but I'd want anything else protected at least a bit. For now I'll do the same process of moving data off, wiping the pool and starting a new one. The grouping of multiple drives in a cache is referred to as building a cache pool. That means that if your Cache is set to XFS (which is the default for single Cache drives) then you won't be able to just add the new drive. Create new cache pool with new drive. I'm running appdata in a cache pool, I have 1x 120GB and 1 x 256GB SSDs. Change the shares back to cache:prefer, and run the mover again, then enable dockers and VM's. Assuming my Cache Pool is setup correctly and being used (6TB total with RAID 1 so 3TB available): You don't need to do anything in the shares page to add a pool device, just on main, change the number of slots, add a device, start the array. RAID 1 mirroring will set the new mirror drive to the same size as the existing. By ApriliaEdd February 20 in can I then move/reassign the 2Tb drive to "cache" and change the number of slots to 2 so it will run with 1x 2Tb drive with a spare slot ready for another 2Tb drive when I'm ready? Stay informed about all things Unraid by signing up for our monthly newsletter I moved them back into the Unraid machine, booted, up and found that the array and cache were both up along with the dockers and VMs. Currently cache is the 500GB, cache1 is 1TB and cache2 is 1TB. Everything was fine for a couple days but I just attempted to upgrade to 6. Here's what I did create new pool, name it docker add single disk to new pool unpack the contents of my old docker unassigned device disk to the new docker pool. Assign the devices you wish to the cache slot(s). Wait until it mirrors all the data to the new drive. Stop the array. I just SSHed onto the box and created some folders under my tv and movies shares (using FUSE, so /mnt/user). I would like to swap out my smaller single cache drive for two larger drives. Hi I followed this post on how to replace the CACHE Pool Drive with a new one. My current Unraid setup is just a testing/ I accidentally changed the pool size of my xfs-encrypted cache to 2, didn't realize the mistake and started the array. So what i did was i stopped the Array, selected the new drive (So that the new one appears in "Cache" and the old one goes to "unassigned". This video is a tutorial about how to add a cache drive to your server. Been using BTRFS for a while. My question is - how do I now safely remove the SSD from the cache pool without los Kind of confusing, but I'm having an issue where I try to copy a file from a share A that is set to only use cache pool A, to share B that uses cache pool B, but mover moves files to the array. I have an HPE DL380 Gen9 server with 2 PCIe adapters for my NVMe drives There are 2x WD Blue SN570 1TB drives setup in a cache pool, using 1 for redundancy I was noticing that when transferring to my shares from Windows I was getting only around ~500 MB/s when it was NVMe -> NVMe transfer. done ZFS is better, but it's also a RC implementation in unraid, so at this point, you may run into caveats still showing up in RC threads. ) Torrenting directly onto the main array is questionable at best, so what you'd have left as an option would be I'm running the latest Unraid 6b15. Well for starters, half my cache right now is taken up by Dockers (mainly Plex). Select cache:only and select pool:docker, name the sha Okay, so I ended up moving all the data from that pool to the array and deleting the cache pool. If you’re running VMs you may want With the release of Unraid 6. 5TB which is RAID1 BTRFS type, which I'm fine with. The server will contain 6 total drives, 12TB 7200rpm as the Parity drive, and 5x 8TB 7200rpm drives. Unraid version: Version 6. What is the procedure to replace one of the drives in this scenario. img size in the settings set to be 150GB for a rough total of 200GB of space used on my 256GB cache pool. I want to change this ssd disk and It's currently in xfs mode. After months my focus returned to Unraid. I now get the following error: pool: cache state: SUSPENDED status: One or more devices are faulted in response to IO failures. I have a couple of NVME SSD's in a cache pool and cannot change temp thresholds. Change the number of Slots to be at least as many as the number of devices you wish to assign. Installed the ram, booted normally and went to start the array and my cache pool would not start. Assigning devices to Unraid is easy! Justremember these guidelines: 1. If you put a second disk in an already existing cache pool Unraid sets them up sa RAID1 by default, which means the 2nd disk is 1:1 copy of the 1st. Do i just stop the array, remove one of them then put the new d The pool cfg is not correct, to reset the pool unassign both pool devices, start array, stop array, re-assign both pool devices, start array, post new diags Done. I'd like to replace them with 2 x 250GB SSD's. Hi, I want to change my current config of 2x 1tb ssd as a btrfs volume to 2 separated 1tb xfs encrypted volumes. I'm trying to change my RAID1 cache pool to RAID0 which should give me 240GB available with increased speed over BTRFS You can use a single-drive cache 'pool' for the torrents if you don't mind no redundancy, but I'd want anything else protected at least a bit. Then i started the Array. Besides getting OS update, I'm also catching up with the settings. The big win here is that you could consider using a very cheap 10K If they're different size drives, then don't make a cache pool. I found this from the Unraid 6 FAQ and this and it seems straight forward enough but it only talks about replacing one of the drives. Set new drive to be a cache, set all shares back to use cache: yes. After this I noticed that one of the two SSD's was dropped out of the cache pool and was shown at the Unassigned drives. I select Pool of 2, assigned the second cache disk and it says Unmountable: No Pool uuid. Those being that btrfs RAID-0 can be setup for the cache pool, but those settings are not saved and "revert" back to the default RAID-1 after a r It is a bit more subtle in that before even trying to put a file on the cache pool Unraid checks to see if the current free space on the pool is more than the Minimum Free Space value set for the pool (if not it bypasses the pool). You edit a share and set it to “yes”, “cache only”, or You can not create a pool of devices with xfs. Disable VM 2. If you do not have a cache drive, will store on the array, and if a cache becomes available the data will move to the cache. (Though an overnight snapshot might also work fine, metadata doesn't change that often. Run a new config while preserving everything but your cache pool, reassign a single drive to cache then delete the partition and select xfs. Is it correct, that I can simply swap 1 of the drives, and on reboot, select the new drive, in the dropdown where it says missing disk. Posted From what I understand ZFS uses cache both for writes to then dump into the pool and for reads. If they're different size drives, then don't make a cache pool. Start the array without the old dive in the cache pool. Done. Assuming that cache disks work in the same way the arrays do, I added an old 60GB SSD (Cache2) to the existing Cache (128GB SSD). So I was wondering if it is beneficial to put my downloads folder on my cache pool to speed up downloading. This is all outlined in the wiki BTW. Would like to replace with 2x 1TB NVME drives in BTRFS RAID1 pool. Add the new drive to the cache pool. One of the drives disappeared. Points as follows: Currently I have 4x 400gb SSDs in a BTRFS RAID10 pool. Followers 0. I am interested in performance, so I want to put the pool in Raid-0 mode - however, I can't get it to Raid at all. Hi everyone. b. Afterwards I tried to enable docker and VMs only to find neither of them would work. So when you don't already have your Cache pool on that filesystem, it would have to be formatted so anything that is on it will be lost. If no free space exists, tough shit, bad stuff happens. , if you transfer a large file from/to the btrfs cache pool, all the dockers in unraid will lock up. Always pick the largest storage device available to act as yourparity device(s). The volume contains a directory named 'appdata' try to share the pool in shares. Why does With Unraid 6. Greeting Everyone, I have just finished swapping out several of my exisitng drives for larger sizes. How can I reformat it and start over? you can change to single profile to use full pool capacity. Both disks are formatted btrfs, and the Main screen shows cache 2 as "part of a cache pool", however, it doesn't seem like the drives are pooling properly. Hi All, I am new to unRAID, but love it so far! I have been setting up my personal server for the last few days and have it setup almost completely. Also you will learn how to upgrade or replace an existing cache driveand how to creat I had 1 Cache formatted as XFS and wanted to add another drive for Cache Pool. The zfs_cache is used by cloud sync service shares only (dropbox and megasync). I don't have that file in what I see as /config/share. You can (optionally) have a pool called ‘cache’. I tried to change the raid1 to single to remove the second drive - well that seemed to cause a problem. Insert new drive, spin up array. My primary concern is speed of the server as a whole when doing file transfers. Then after starting your array select the format button and checkbox. Installing Cache Drive(s)# switch all the shares that you wish to store on the cache drive to Prefer, before installing the term cache is often used in two different contexts with Unraid. My goal is to remove the 500GB and just run the 2 1TB SSD in a 2-drive cache pool. I had a single cache drive (Samsung 980), today I moved everything from cache -> array. I stopped the pool and tried to select the missing disk and started the pool. Then run mover. Followers 1. How is this being set up these days? Is this covered by setting up t Hi All, I have dual 120Gb SSD drives as my cache pool. Subscribe. Was easy. A scrub revealed that the same file had gotten corrupted as in 2022, albeit in an entirely different container I was curious how you would go about upgrading a 2 drive mirrored ZFS cache pool to a 3 drive raidz pool. Hi - I've found guides for adding a second cache drive to make a RAID 1. When I use Windows (so, SMB) to copy from sh 1. 0 it says: There are two ways to configure the Pool devices: 1. I tried to create a new cache pool and assigned th Harnessing the Power of ZFS on Unraid. You can set each share to cache: yes, no, always, prefer. Scroll down to the section labeled Cache Devices. 11rc4 with i-5 12600k alder lake cpu and finally got transcoding working but as soon as i try to transcode multiple streams i get cache btrfs errors and shuts down everything running off the cache pool. All is in RAID 1 on the pool. Transfers from my desktop PC (i7 6700k, gigabit, ssd etc My cache pool thinks it is running a 1. As a single device, or 2. Also has better bitrot protection just watched @SpaceInvaderOne's video on how to easily reformat the cache pool. Quote; Join the I decided to take the jump and move to a cache pool with 2x SSDs. I am migrating my 'Unassigned devices' to Cache Pools, so far it is a great improvement! I can't believe I did not know about Cache pools earlier. It told me it could now see the drive and it wasn I created a RAID 0 cache pool using 2 new SSDs BTRFS formatted. But it does not say how, or if the default is 1 or 2. Shutdown unraid, added the 2 new SSD's, booted back up and assigned them in 2nd and 3rd slot for cache pool. Set these to move the data onto a different pool or the main array. Have tested with Firefox, Chrome, and Safari. After it’s finished, set back to cache “preferred” but change your cache pool locations to the new pool. If I attempt to add it back to the cache pool it wants to format the cache pool. 7. The unRAID cache pool is created through a unique twist on traditional RAID 1, using a BTRFS feature that Hi, Today i merged my unassigned SSD/data back into the main pool, and now have 2x 1Tb drives in a SSD cache pool for a 3x 4Tb HDD array. I have received a replacement drive. Cache pool of 2 m. Hi all, I've set up 2 identical drives as my cache pool. Yes indicates that all new files and subdirectories should be written to the Cache disk/pool, provided enough free space exists on the Cache disk/pool. Current setup: 4TB Parity with Array devices: 2x 2TB and 1x 4TB + zfs cache pool with: 3x m2 ssd. Wondering if you can use ZFS on the Cache pool of 2xM. Then delete the pool I added a second SSD cache drive to give my UnRAID today in the hopes of bumping up the space then realised it was by default mirrored to RAID1. Sometimes they are configured in multi-disk (JBOD), which simply adds them together with no speed or redundancy benefit. Stop Array to add new cache pool Change appdata and system shares to use new cache pool Start Array Delete all appdata and system share Restore backup, using Backup I'm running the latest Unraid 6b15. Once done, I'll build a new cache array and migrate the appropriate data back to the cache. when i had the issue from the previous post the 'missing devices' warning happened overnight with the machine running. disable docker 3. If you want more space the easiest thing would be to remove the second disk from the pool, add a new cache pool and add the new disk only to this 2nd pool. I have setup a lower threshold to warn me. To avoid using the old approach of having the mover temporarily move shares off the old pool and then back onto the new soulds like a docker is runing and is misconfigured in its storage where it writing to the docker image and not teh disk in the uraid array. When you assign/unassign devices from the cache pool, unRAID OS figures out what the configuration change implies in terms of what btrfs management commands need to be issued. The old ones are also 1TB each and M. I can use it for appdata and docker image. First I started with a single 500GB SSD, then I added a 1TB SSD and later another one. For historical reasons the default name for the first pool is ‘cache’. My cache pool thinks it is running a 1. When I use Windows (so, SMB) to copy from sh Hi everyone, I recently bought a second 1TB Cache drive to add to my cache pool, after the initial 500GB drive grew too small and I had already added another 1TB. change cache slots to 2 or the correct number assign new disk(s) to cache pool start array - a balance will begin, the Yay I finally maxed out my Unraid mobo today: max ram capacity, best CPU it can handle, every SATA port used, every PCIe lane in use When you assign them both to the cache pool, unRAID will automatically create a btrfs RAID1 pool. cfg I can see it at /boot/config/share. If I remove it from the pool and re-add it nothing changes, it just starts the array and the same errors continue in the log. By I tried to change the raid1 to single to remove the second drive - well that seemed to cause a problem. But the problem now is most of my media files that were in the pool (moved to array) are corrupted. unraid will see a pool drive missing. I assigned one drive to cache, formatted it, stopped the array, assigned cache 2, started I have a 2 SSD cache which i want to change to a single ssd- i've run the convert to single mode command which went fine. I've had them in RAID1, but as that only gives me 120GB of space and try as I might to slim it down, my appdata + docker. I added 2 SSDs to my cache pool (1x 120GB Samsung 840 Pro, 1x 240GB samsung 850 Evo). zip Hey Unraid community, I recently upgraded to 6. change drives However this is a little painful and slow. In that case, two videos have been created for a step-by-step guide through upgrading your Unraid cache pool to either a larger drive or just reformatting the one you have to a ZFS file system - all without losing a single byte of data! removing a cache pool removing a cache pool. 2 Drives the same size. As far as I've already I have a primary cache pool of several drives that's explicitly for files. As with any change in the RAID level, it has to be initialised again. ) Torrenting directly onto the main array is questionable at best, so what you'd have left as an option would be Hi I followed this post on how to replace the CACHE Pool Drive with a new one. On the Main screen it states that the two disks are part of a pool, and the size is reported as the size of a single disk. Hey Guys, I just got into Unraid and literally just setup the drives the other day. Today I got a warning on my Docker_Cache ssd disk. I just set up an unraid 6. For yes, writes go to cache first and the mover transfers them to the array later; for no, writes go directly to the array; for prefer, writes go to cache and stay there as long as there is enough space, mover will move data from array to cache if needed; for Sorry Rob, didn't realize it was part of the official docs, and that procedure works, in fact it's very similar so some of the other methods in the FAQ, but I find the other method cleaner and less prone to issues, especially if there's some issue with current pool, also no need to power down the server, but LT will decide if they want to change something. W Go into the settings for the relevant share and adjust the setting for "Use cache pool" and "Select cache pool". If you want the full TB of space then you can change the RAID method in the settings of the pool. I think it largely depends on what you use the cache for => if you use it for the traditional function of caching all the writes to your array, then I'd personally want those to be fault-tolerant from the instant I wrote them to the server, so I'd Hello Unraid Forum, my Unraid server runs as media and gaming machine. Example: I have: (2) 1 TB SSD drives If I set these two identical drives up in a Cache Pool, as an OK, now I feel like a complete moron. I've done a search, but can't find an article which describes how to do this. 2. Im still learning UNRAID, so any help is much appreciated. Then set system and appdata to cache: only to keep files on the cache rather than array. It keeps things much simpler if this kind of work can happen with all devices unmounted. By ApriliaEdd February 20 in General Support. The only downside that I can see is that I lose out on being able to use Sonarr and Radarr to hardlink the downloaded files, since the media Hello. Now I wanted to add the second 1TB and move to raid1 have better data security and remove the 500GB thereafter. change all shares to cache=yes 4. Wenn ich die beiden NVMEs in eine Cache-Pool (2x500GB Raid1) laufen lassen würde, könnte ich doch die Appdata ISO, VMs Ordner im Cache only Modus betreiben und die Videoaufnahmen von der VU+ direkt auf dem Array Video SMB Share z. Transfers from my desktop PC (i7 6700k, gigabit, ssd etc Delete old cache pool. I tried running with BTRFS with two drives and always end up with one drive going into read only mode randomly. Then run Mover and wait. You cannot remove a drive from a pool using the single profile (or other non redundant profile), please post current diags after a new reboot and before array start. New - DARK - Invision (Default) Hi all, I've set up 2 identical drives as my cache pool. It may or may not be used for ‘cache’ functionality. I would recomend user script plugin and run these 2 scripts: The safest way would be to set the shares you want to move to a new cache drive to “yes” but leave the cache pool location alone. I also created a separate secondary btrfs formated cache pool with its own singular non-redundant ssd for docker appdata. Shut down the server, remove the drive. As a result of this, I have been able to migrate the remaining data with the help of Unbalance to those larger drives thus freeing up 18 no longer needed drives. Subscribe This happened to me many times before with chrome, but more recently with firefox and chrome worked, in any case it's usually fixed by using a different browser, but you need to a the whole procedure with it, assign cache, start array, stop array, reboot. this is the relevant part of diag Hey Guys, I need some help. I bought 2 nvme disks that I want to use in btrfs insead for this Docker_Cache pool. Since VMS and dockers are running from that cache pool, i wanna make sure it just works. Plex has just about filled it up with its database. Cache “Prefer”: new data is written to the share’s assigned cache pool. What is the best way to go about this? My take: 1. Cache Pool btrfs Raid1 unmountable Cache Pool btrfs Raid1 unmountable. That should empty the cache pool on to the array, then you can remove the cache pool, and recreate it with the SSD's. Did a clean shut down of my Unraid server yesterday to install some new ram. New diag attached. cache pool is twin crucial 1tb nvme in raid 1 . Booting it back up today, the cache pool has also reverted to how it looked at the start of this thread. 5TB drive, but hardware of the drive is 1TB. It's formatted as a ZFS RAID0 (striped) if I remember correctly. 9. The benefit of these pools are you can now have a cache per share in Unraid. Use Mover to move contents of cache to the array. I rebooted the machine and was notified of cache pool corruption shortly after. action When I unassign the cache 2 drive and restart the array the other cache disk comes up as unmountable and unraid is asking to format it. 2. It will only work if no app data files are in use, so shut down your docker and VMs first. I'd also like to setup a cache only "Games" share for use with Steam. After the cache is created you have the process right. Im hoping i didn't destroy my unraid server. Go to unRAID r/unRAID. I tried to open them and got errors in mpv. can I then move/reassign the 2Tb drive to "cache" and change the number of slots to 2 so it will run with 1x 2Tb drive with a spare slot ready for another 2Tb drive when I'm ready? Stay informed about all things Unraid by signing up for our monthly I moved them back into the Unraid machine, booted, up and found that the array and cache were both up along with the dockers and VMs. Delete old cache pool. For yes, writes go to cache first and the mover transfers them to the array later; for no, writes go directly to the array; for prefer, writes go to cache and stay there as long as there is enough space, mover will move data from array to cache if needed; for I tried following the unraid wiki about checking the file system and I must have done something wrong, as now the cache_ssd is unmountable. My current cache pool looks like this: I would like to convert that pool into a single drive and simply use the 250 GB Samsung SSD. I had a go at bringing the cache pool back online using your steps above, as the terminal response from each step was the same, however after reaching this step: Go into the settings for the relevant share and adjust the setting for "Use cache pool" and "Select cache pool". Initiate mover, wait for it to finish. By Schulmeister January 17 in General Support. repeat 2-4 for 2nd drive. After realizing what I'd done, I stopped the array and tried to undo the change, but the pool size couldn't be changed anymore. Set system and appdata to cache: prefer to move files to cache from array. The forum posts I have found cover only older single drive cache pool scenarios. Do I just add the 2 nvme disks to the Docker_Cache pool and then change the file type to bt After swapping a failure parity disk, added one more disk (i thought Unraid OS Plus was 10 disks, not 12), added one NVME disk. Howev - Unraid version 6. I've no idea how to do that. 5 on the pool? Any help/advice is appreciated. Shut down the server and remove the old drive. Cache can be SSD or HDD based. Set the shares that are on the cache to transfer to the array in the share settings. I've used CA appdata backup to copy everything into the main array, and I'm k updated to 6. shut down array replace 1 drive with new drive start array. I am able to plug in both the old and the new. Assign new drive to pool. I've run a balance and a scrub since originally posting this new problem. As a multi-device pool. I'm at 93% capacity. 9, we have included support for Multiple Pools, granting you even further control around how you arrange storage devices in your server. So what does this new functionality offer? Separate In v6. That doesn't leave me a lot of wiggle room with regard to copying large amounts of data to my cache drive. Click onthe Maintab and select the devices to assign to slots for parity,data, and cache disks. My question is - how do I now safely remove the SSD from the cache pool without los This includes the cache device - because really it's a cache pool now and you have to be able to add devices to the pool, remove devices etc. The goal is to have the most storage/redundancy/gaming performance as possible. 2 drives: 2nd one does not show used/free space If you do not want redundancy on the pool you can change the profile to be 'single' and then run a Balance which will then give you 1TB in the pool. Since you started docker before you completed this step properly, you now have duplicate files i have 4 SSDs (2x 500gb EVO 960 nvme, 250gb EVO 850, WD 256gb nvme) setup as cache drives in my unraid. You need to backup your data. Example: I have: (2) 1 TB SSD drives If I set these two identical drives up in a Cache Pool, as an updated to 6. E. 5TB? Or some magical way do I have 1. just like the array. I would like to remove them from t Issue is, anyone using Samsung SSDs (among other brands too) in a btrfs cache pool in unraid will see performance fall off a cliff due to partitions starting on sector 64. Copy all data of the cache volume including docker img etc. I've added an SSD to my Unraid box, and then I proceeded to add the SSD as a cache drive and subsequently setup a BTRFS cache drive pool with my previously existing cache drive. Theme . Ich glaube meine Kernfrage ist vielleicht auch eine Verständnisfrage. (I know, Raid5 is experimental with The cache is the size of what ever drives you assign to the cache pool. The issue is that I When you assign them both to the cache pool, unRAID will automatically create a btrfs RAID1 pool. Create new cache To assign devices tothe array and/or cache, first login to the server's webGui. All drives are part of a btrfs pool. also good to keep in mind running the mover after unassigning the cache from the shares will not move data back to the array! Best to set to cache yes, stop all apps/vms and everything then run mover, then just to be safe, manually check there is nothing stored on the pool. Copying a 30GB movie as a test to my cache pool consisting of the following:- 250GB Samsung 840 250GB Samsung 850 256GB Samsung 850 Pro gigabit network, unRAID server has a link aggregation group with a quad port Intel gigabit network card. I always end up ripping out one drive and run unprotected off a si I think I'm still having some trouble with figuring out how to rebuild the cache pool w/ the same disk. But I haven't found this exact scenario. I am also having this problem. When you isolate out the cache duties to a single share you get some side benefits; less likely to see random I/O read/write and less cross talk between shares. It's awesome how many features there are in Unraid and how all removing a cache pool removing a cache pool. Typical way to change disks in your cache drive (single or pool) has been to: 1. Then run How to add a cache drive, replace a cache drive, and create a cache pool - a nice video guide The cache disk feature of Unraid greatly increases the perceived performance of the system when writing data to a parity-protected array. i just upgraded my 2x256gb ssd pool to 2x500gb pool. Does anyone know? I want the data protection (nr. How do I fix the Cache drive to only see the pool as 1TB vs 1. I had looked over some different threads (listed below) that discuss how the cache pool is currently implemented in unRAID and its current limitations. If there is insufficient space on the Cache disk/pool, then new files and directories are created on the array. The 2 that are showing errors are the cache drives 1 and 2 if that matters at all. Prefer: Will store on the cache, if the cache is full will move to the array. New - DARK - Invision I'm running appdata in a cache pool, I have 1x 120GB and 1 x 256GB SSDs. Which steps do I need to follow? PS: It is mostly for the sake of learning; I know that having a redundant cache is ideal. What's the best way to clone the existing cache drive + add mirror? OK, so I have migrated all Cache content to the array. Invoke the mover to move everything to the array. New - DARK - Invision (Default) New - LIGHT - Invision . So, after installing the 2 drives, and starting the raid, this is what my screen looks like (refer to attached image). Change the shares preference to use only cache drive. Checking with netdata, the ZFS ARC Size is set to 7. Typically, multiple cache drives are configured in RAID 0 (speed) or RAID 1 (redundancy). Starting/stopping with unassigned/reassigned cache, swapped the cache disks around, same thing. Navigate to the Main tab. . 9, it’s pretty easy to add multiple cache pools. For example, if you add a new device, unraid os will issue a "btrfs device add" command immediately following Mount (and at present is part of Mount). invoke mover, wait for it to finish 5. I tried pathing the vdisk to the cache drive I also tried pathing the libvirt. Running 6. Stay informed about all things Unraid by signing up for our monthly newsletter. The shares are configured to use cache and array. Shut down array and all docker containers This is where i am not sure While checking the docker settings i see that is says its using a btrfs docker vdisk, do I need to change this to xfs? Appdata is in a separate btrfs cache pool. Execute the mover Once it’s complete, the ideal prefeeence is to “prefer” cache, not “only cache”. I tried to create a new cache pool and assigned th I stopped the array and the cache disappeared again, but on a full shutdown and then starting back up it re-appeared and i got this it auto-mounted and was correctly assigned again. this is super confusing. I stopped my array after adding my new third device but didn't find any way to expand the zfs pool and change the type. Following this post I managed to mount the drive to a temp folder and am currently copying all the files from it. 2 recently and assigned two nvme cache drives to the array to create a cache pool. Mover moves data from the array to the cache pool when invoked, assuming free space exists. For AppData, I set the “domains” “system” and “appdata” to go to this location. I have rebuild the unraid usb multiple time, switch the cache disks around but at random one cache drives goes missing sometimes its the m2 or any of the s I believe I had a cable come loose on a cache drive and I restarted the array without the drive twice and it now is presenting me the missing cache pool drive as a new device. Take cache offline, reformat and then use mover to move appdata, etc back to the cache. img location but nothing seems to be working. First, let’s go over how cache works in Unraid. 83 GB and is pretty much always full. My current Unraid setup is just a testing/learning environment. Hey Unraid community, I recently upgraded to 6. I have a main cache pool (called cache) and a ZFS pool (called zfs_cache). cfg The cache is the size of what ever drives you assign to the cache pool. r/unRAID. I assume by default unraid sets the zfs cache size to 8 gigs somewhere in the config? Is there a way to increase this? Main, Cache Device, Change the format type to what you want. I was unable to get the diskspeed docker container to work with my NVMe drive since it's active in a cache pool so I decided to run a dd speed test on one of my VMs and got the following result: When running dd from Unraid I get more than On my VM I am getting slow speeds still but I didn't change anything on where the Share Storage Conceptual Change. Specifically, zfs can do raidz levels reliably as compared to btrfs. So I decided to just blow away the cache pool and start over again since I had just started playing with dockers and didn't have much to lose. Run I am building an unraid server right now and I am trying to figure out how to setup my Cache Pools. If the original cache is xfs, you have to clear the drive, format the drive and create a new cache pool. Yes: Cache isos (empty afaik) Development (~10GB of source code) I also have my docker. Question on reworking my cache pool. To clear the drive, set all the shares currently using the cache to cache:yes, stop Sorry Rob, didn't realize it was part of the official docs, and that procedure works, in fact it's very similar so some of the other methods in the FAQ, but I find the other method cleaner and less prone to issues, especially if there's some issue with current pool, also no need to power down the server, but LT will decide if they want to change something. The old concept of main storage being the unRAID array with an optional "Cache" is confusing to many new users, Kind of confusing, but I'm having an issue where I try to copy a file from a share A that is set to only use cache pool A, to share B that uses cache pool B, but mover moves files to the array. Currently it bothers me that all 3 of the array devices bring a new zfs pool with 3 mount points. Cache A is RAID5 NVME SSDs and Cache B is RAID1 NVME SSDs. If its already what you want and just want to reformat it, then: Change it to anything else. It never asked me which type of raid to put them in? It says there is a total of 1. 2 drives: 2nd one does not show used/free space Cache pool of 2 m. This video is a comprehensive showing showing how to enhance your Unraid setup by either upgrading your cache drive to a larger capacity or switching over to I just bought 2 new 1TB NVME SSDs for an existing cache pool in unraid. It was shown as 'unmountable - no file system', I have no clue how to fix this. Members Online • Currently I am only utilising around 30% the cache pool as I'm using a 500gb ssd to passthrough to my vms to hold my games. Found articles talking about how to replace single cache drives, but not when they are in a RAID-1 configuration as dual drives. Is there a way to set the arc cache size manually? I am running 128gb of ram in my server, with mirrored 1tb cache drives but it seems like the system is limiting the zfs arc cache to 16gb. Then use the mover to move it to the new pool. However, my second pool was missing the first drive so I shut the machine back down, checked the connections, booted back up, and now the second pool is doing the same thing the first one is. Then reverse the process; Delete and rebuild the pool as you need Put the share cache settings back as before Run Mover again at the moment I am running a single SSD cache pool with 3 drives. Unraid OS 6 Support ; General Support ; Cache pool keep going read only. 13 I have a cache pool consisting of two 4 TB WD Red SN700 NVMe SSD. Suppose you have decided you want to use ZFS on your Unraid server. I'm now running some tests on the cache drives on a separate system. so the total space adds up to 1500gb but my cache pool Ideally stop all dockers and VMs. I have 4 SSDs in my cache pool right now and two of them are showing some errors so im going to replace them but im not sure how to go about doing so. On the topic of shares; I see that there is no "Use cach pool (for new files/directories)" option anymore. Only then, did I n As you've already concluded, it's a personal choice that depends essentially on whether or not you want your cache to be fault-tolerant. You do not have to have a pool Cache “Only”: new data is written to the share’s assigned cache pool. Thinking it may be a heating issue, I powered off the server, waited for 30 minutes, and booted it again. So now I have Cache 1 and 2 assigned (with the (SOLVED) Cache pool: "Unmountable: Unsupported or no file system" (SOLVED) Cache pool: "Unmountable: Unsupported or no file system" By Xenu October 20 Stay informed about all things Unraid by signing up for our monthly newsletter. Assign new cache device to slot, start array, format new cache drive, set appdata share back to cache prefer, run mover. I had to fix the drive (use sfdisk 2048 and not remove the signature) and ended up fixing the issue thanks to JorgeB. img is now pushing 115GB. 2 Tried to change the configuration to use SMP, which didn't work because I couldn't get memtest to recognize my usb keyboard. To re-format the pool stop the array, click on the first device of the pool and then click "erase", then start array and you will have the option to format the pool Hello. What i'm trying to work out is Go to each share and set the cache to your new cache pool. How can I get my cache pool back? hydra-diagnostics-20180713-1053. Personally I think there is a good case for selecting a different default name in the future. Already confirmed that all of the files exist both in the cache and the domains in the array. g. 2) for my two SSD cashe disks. New in this release is a conceptual change in the way storage is assigned to shares. Best Regards Quote; JorgeB. Thanks for the help in advance. It doesn't detect it as a NEW member of the pool and replicate data to it. Delete Pool also doesn't work. 0 Unraid OS Pro Edited March 7, 2021 by Nathan Burns If you've got an empty cache at the moment just take the old drives out, put the two new ones in and configure as raid 1, make sure all shares are set to use them as a cache pool and then change settings for any shares you want to be on the cache to "prefer" and invoke mover, then start VM/docker services. 12. You should set the Minimum Free Space value for the pool to be larger than the biggest file you expect to transfer When you switch to a Cache pool IIRC the default Filesystem is BTRFS. arjw wefyt aethb mcbaio pvvjg veozn jppec vsdrxy ifyjd tidb