sniggil Posted August 16, 2021 Share Posted August 16, 2021 Good afternoon. Long time listener, first time caller... I'm using Unraid 6.9.2. My flash drive crashed. My flash backup of 3-AUG was prior to replacing 2 of 4 cache drives in a Btrfs pool. I should have, but didn't make another backup after the drive replacement. The first two slots did not change, only the second two. Since I replaced the last two with identical drives as the first two, I think I should: 1) Use flash creator to prep a new flash drive 2) modify the cache config file (config/pools/cache.cfg) to reflect the changed the serial numbers to match the new drives, 3) install the flash drive and boot the server Is this the best approach? If I have the slot position of the last 2 cache drives backwards... for example diskId.2="Samsung_SSD_860_EVO_1TB_serialnumberxx1" diskId.3="Samsung_SSD_860_EVO_1TB_serialnumberxx2" vs diskId.2="Samsung_SSD_860_EVO_1TB_serialnumberxx2" diskId.3="Samsung_SSD_860_EVO_1TB_serialnumberxx1" will it be a problem ? Quote Link to comment
JorgeB Posted August 17, 2021 Share Posted August 17, 2021 Did you change devices or just the order? Pool device order is not a problem, as long all devices are correct. Quote Link to comment
sniggil Posted August 17, 2021 Author Share Posted August 17, 2021 I changed devices, but if I correct the config/pools/cache.cfg file would that be enough ? Quote Link to comment
JorgeB Posted August 17, 2021 Share Posted August 17, 2021 If you changed devices you can do this to reset pool config without losing data: Stop the array, if Docker/VM services are using the cache pool disable them, unassign all cache devices, start array to make Unraid "forget" current cache config, stop array, reassign all cache devices (there can't be an "All existing data on this device will be OVERWRITTEN when array is Started" warning for any cache device), re-enable Docker/VMs if needed, start array. Quote Link to comment
sniggil Posted August 17, 2021 Author Share Posted August 17, 2021 Thank you again. Followed your guidance. Everything works. No issues. New Flash BackUp made. 1 Quote Link to comment
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