This bug is missing log files that will aid in diagnosing the problem.
While running an Ubuntu kernel (not a mainline or third-party kernel)
please enter the following command in a terminal window:
apport-collect 1752961
and then change the status of the bug to 'Confirmed'.
If, due to the nature of the issue you have encountered, you are unable
to run this command, please add a comment stating that fact and change
the bug status to 'Confirmed'.
This change has been made by an automated script, maintained by the
Ubuntu Kernel Team.
** Changed in: linux (Ubuntu)
Status: New => Incomplete
** Tags added: artful
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https://bugs.launchpad.net/bugs/1752961
Title:
With kernel 4.13 btrfs scans for devices before all devices have been
discovered
Status in linux package in Ubuntu:
Incomplete
Bug description:
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
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