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How do I recover data from a BTRFS Fedora partition if live images do not "see" the disk? (lemmy.wtf)
submitted 2 days ago by nitroemdash@lemmy.wtf to c/linux@lemmy.ml
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I cannot get further than GRUB except to rescue mode, when I attempt to boot the main Fedora OS it gets stuck on searching for a disk indefinitely. Gets stuck on Job dev-disk-by\<many symbols>.device/start running (1h / no limit) in the console.

I have a Windows partition on same drive, it also doesn't boot, it's rescue command prompt (from where you are instructed to open notepad to rescue files) doesn't "see" any disk but C: and X: (emerg boot).

I tried booting this machine with two live OS USBs: Fedora and SystemRescue. Neither of them list the SSD (or anything but the USB drive FS itself) in lsblk or the file manager.

Due to lack of storage mediums, I haven't done a backup in a while. How can I rescue the files? Many passwords are also stuck there, in Firefox manager I wasn't able to sync due to losing access to the 2FA email.

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[–] nitroemdash@lemmy.wtf 2 points 2 days ago (2 children)

Latest DMESG logs are several days old, I'm not sure I had this problem back then. Nothing seems to be useful there, standard USB connect/disconnect stuff.

I enabled S.M.A.R.T. in BIOS, it seems it doesn't see an issue with the drive (PredictFailure in wmic is FALSE)

PhotoRec and TestDisk do not see the disk when booted from live media, only the 15GB drive itself and 804MB loop0.

[–] mvirts@lemmy.world 0 points 1 day ago (1 children)

Can you post your dmesg output from booting a live USB? Maybe there will be a clue in there.

How is this ssd connected? Nvme? Sata?

[–] nitroemdash@lemmy.wtf 2 points 1 day ago (1 children)

It appears the time was broken, the logs were new.

Here are logs from the live USB, this link expires in 2 weeks, I will preserve it if you'll find anything relevant there: https:/termbin.com/975x

NVMe

[–] mvirts@lemmy.world 1 points 13 hours ago (1 children)

There are some ideas here:

https://bbs.archlinux.org/viewtopic.php?id=283906&p=2

I think the key line is SATA link down (SStatus 4 SControl 300)

[–] nitroemdash@lemmy.wtf 1 points 8 hours ago

Yeah, already solved, check the update. Mode was set to RAID over AHCI for some reason.

[–] atzanteol@sh.itjust.works 0 points 2 days ago (1 children)

When you boot a recovery image does it have any dmesg logs though? You should see something there when you try to mount it

Does "fdisk -l" show all your partitions on that drive?

[–] nitroemdash@lemmy.wtf 1 points 1 day ago* (last edited 1 day ago) (1 children)

No, fdisk shows only the drive itself.

I didn't find any obvious errors in dmesg logs, but again I don't know much about them. You may check them out here: https://termbin.com/975x

[–] atzanteol@sh.itjust.works 2 points 21 hours ago (1 children)

This seems suspicious

Found 1 remapped NVMe devices.
Switch your BIOS from RAID to AHCI mode to use them.

Have you setup a RAID?

[–] nitroemdash@lemmy.wtf 1 points 21 hours ago* (last edited 20 hours ago)

Don't recall doing so. I think I saw something about automatic switch to/from RAID and AHCI in boot logs?

I've actually seen "something/AHCI/RAID" switch in BIOS set to RAID. Will try switching to AHCI.

Edit: IT WORKED! I changed RAID to AHCI, now the system boots as expected. Thank you. Will change to solved.