December 7, 20241 yr Hello everyone, I currently have two SSDs: one is configured in RAID, and the other is set up as a cache. I’d like to repurpose the SSD from the RAID to use it as a cache for creating a cache pool, and then add an HDD to the now-free RAID slot. What is the recommended procedure to achieve this configuration? Thanks in advance for any guidance!
December 7, 20241 yr Community Expert Not sure I follow, how do you have one SSD in RAID? Please post the diagnostics, or a screenshot, or both.
December 7, 20241 yr Author 5 minutes ago, JorgeB said: Not sure I follow, how do you have one SSD in RAID? Please post the diagnostics, or a screenshot, or both. Sorry... i have 3 hdd and 1 ssd in the raid. The parity disc is hdd. The goal is to move ssd to pool cache and add a new hdd in slot 1 Edited December 7, 20241 yr by Duarte
December 7, 20241 yr Community Expert We call that the array, is there still any data that you want to keep on disk1 and which filesystem is the current cache using?
December 9, 20241 yr Author On 12/7/2024 at 6:22 PM, JorgeB said: We call that the array, is there still any data that you want to keep on disk1 and which filesystem is the current cache using? Yes... I have data in the disk1 that want to keep and the cache is xfs.
December 9, 20241 yr Community Expert XFS can only be used as a single pool, so you would need to backup the data first, then create a btrfs or zfs pool.
December 9, 20241 yr Community Expert On 12/7/2024 at 12:50 PM, Duarte said: Sorry... i have 3 hdd and 1 ssd in the raid. The parity disc is hdd. The goal is to move ssd to pool cache and add a new hdd in slot 1 1. You will need to move the data off of disk1 onto disk2 and disk3, you can use the "Unbalanced" plugin for this. Once you've done, this you will need to reset the array drive assignments using the "New Config" tool. 2. You will not be able to add the now removed SSD to the existing cache pool unless you decide to swap filesystems from XFS to either BTRFS or ZFS. You will need to add it as a second cache pool or move the data off the old cache drive onto the array and re-format the cache drive while adding the 2nd SSD to the cache pool and putting them into either a ZFS mirror or BTRFS RAID 1 (both default options) Edit: If you go with step 2, don't forget to move the data back on to the cache drives. Edited December 9, 20241 yr by MowMdown
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