On 3/14/19 4:57 PM, Hans van Kranenburg wrote:
On 3/14/19 4:44 PM, Michal Soltys wrote:
Hi,
I have btrfs set for root filesystem using two separate partitions,
essentially:
abel: 'xs22_root' uuid: 3754849d-46ab-4db6-8434-2c578b1f6bba
Total devices 2 FS bytes used 8.39GiB
devid 1 size 34.00GiB used 14.01GiB path /dev/sdb2
devid 2 size 34.00GiB used 14.01GiB path /dev/sda2
Data,RAID1: Size:12.00GiB, Used:8.13GiB
/dev/sda2 12.00GiB
/dev/sdb2 12.00GiB
Metadata,RAID1: Size:2.00GiB, Used:256.62MiB
/dev/sda2 2.00GiB
/dev/sdb2 2.00GiB
System,RAID1: Size:8.00MiB, Used:16.00KiB
/dev/sda2 8.00MiB
/dev/sdb2 8.00MiB
Unallocated:
/dev/sda2 19.99GiB
/dev/sdb2 19.99GiB
Occasionally, during reboots (all of them clean of course) I get:
devid 2 uuid <uuid> is missing
failed to ready system array: -2
open_ctree faield
Which drops me into initramfs commandline.
It might try to mount before all disks are visible. This can happen when
e.g. a raid controller needs a little bit more time to initialize.
Try adding rootdelay=10 to your linux command line, or any other number,
and then look at logging when booting (so no quiet on your linux command
line).
It remains unmountable from initramfs's commandline with both disks
(partitions) present. Filesystem is mounted formally via uuid, so it
needs both disks present before udev/blkid can pick the correct devices.
When that happens, one of the partitions is mountable, the other is not.
Mounting the filesystem via the "good" one also fixes the "bad" one.
Tested with 4.20.11 and 5.0.2 kernels.
Any idea what could be wrong ?
Does btrfs require full umount via pivoted initramfs during shutdown ?
Hans
