Ubuntu
linux package

  1. Cosmic (18.10)
  2. Bug #1752961
  3. Comment #0

Comment 0 for bug 1752961

Revision history for this message
Carl Reinke (carlreinke) wrote :

See attached dmesg outputs for booting kernels 4.11.x (working) and 4.13.x (not working).

dmesg-4.11.0-14-good.txt shows the dmesg output when booting kernel 4.11.x.
btrfs scans for devices after all 4 (sda, sdb, sdc, sdd) of the devices have been discovered by the kernel. The btrfs RAID1 filesystem mounts, and everything is good.

dmesg-4.13.0-36-fail.txt shows the dmesg output when booting kernel 4.13.x.
btrfs scans for devices after only 2 (sda, sdb) of the devices have been discovered by the kernel. The btrfs RAID1 filesystem fails to mount ("failed to read the system array: -5"). The remaining 2 devices (sdc, sdd) are discovered by the kernel immediately afterward. At the end of the log, I run `btrfs device scan` and mount the filesystem manually.

Hardware:
  HP ProLiant MicroServer Gen8
  4x WDC WD20EFRX