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@anyone ?

Ok so I set up the array again and I have 5 disks showing as unmountable... :/ I'd like to retrieve sdb as it's the previous flash drive. fdisk -l /dev/sdb fdisk -l /dev/sdb Disk /dev/sdb: 3.75 GiB, 4026531840 bytes, 7864320 sectors Disk model: Flash Disk Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disklabel type: gpt Disk identifier: 319E168E-53D4-42BB-B677-7E2F16E822D0 Device Start End Sectors Size Type /dev/sdb1 64 7864286 7864223 3.7G Linux filesystem

How can I set sdb as boot partition? sda is current temporary unraid installer. sdb is original Flash Drive partition but I can't find anything on it. Tried to check fstab but nothing of interest.

ok so lsblk shows all my disks, sda and sda1 (boot) are still there

Pretty sure it wasn't, here is the config, the drive that had issues was 'backup' Flash disk is sda and wasn't removed. I flashed the old backup disk, installed Unraid and booted from it. Now able to check the drives, config, etc, not sure how I could re-establish/correct boot process from now on though

Hi, Had the same issue as described here: https://forums.unraid.net/topic/190454-upgraded-to-712-and-two-of-my-drives-unmountable-solved/ It only concerned one external SSD I ran as backup. I ran the command sgdisk -g -o -a 8 -n 1:32K:0 /dev/sdb but the array was running... Rebooted and lost the whole server, it won't boot, show shares on network, web UI, SSH, nothing... Have I just lost it all?