Root partition with BtrFS crashed

SUSE Product Topics SLED Install-Boot
1

I have a machine with SLED (15 SP1) installed. After an accidentally power outage, it’s no longer able to boot. Stuck in grub command line, the root ( / ) FS, which should be BtrFS, is missing.
I’ve tried using SUSE bootable rescue CD for a detail look. Seems the FS is crashed.

  • Can’t mount manually, already with “-o recovery, ro” … or other possible options. (wrong fs type, bad option, bad superblock, missing codepage …)
  • “btrfs rescue zero-log” showed parent transid verify failed, couldn’t setup device tree, could not open ctree.
  • “btrfs rescue super-recover” showed all super blocks are valid, no need for recover.
  • “btrfs rescue chunk-recover” showed unable to recover some chunks, failed.
  • “btrfs restore” showed superblock bytenr is larger than partition size.
  • “btrfs check --repair” also showed parent transid verify failed, couldn’t setup device tree, could not open ctree. (It didn’t ask me for confirm repair action)

Any idea?

2

Hi and welcome to the Forum :slight_smile:
Doesn’t sound good :frowning: Is the storage media HDD, SSD, NVMe? Have a read here and see if the suggestions help: https://btrfs.wiki.kernel.org/index.php/Btrfsck

3

Thanks malcolmlewis,
HDD with RAIS 5 (independent RAID card)
And tried btrsfck (btrfs check), seems not work … :frowning: