https://bugzilla.novell.com/show_bug.cgi?id=775746
https://bugzilla.novell.com/show_bug.cgi?id=775746#c1
--- Comment #1 from John Langley 2012-08-13 22:35:49 UTC ---
mdadm /dev/md1 --add /dev/sdb4
starts the array again and it works perfectly for hours until the next reboot.
after reboot today i ended up in a shell:
[ 11.263189] input: Venus USB2.0 Camera as
/devices/pci0000:00/0000:00:0b.1/usb1/1-6/1-6:1.0/input/input13
[ 11.263360] usbcore: registered new interface driver uvcvideo
[ 11.263363] USB Video Class driver (1.1.1)
[ 11.343139] Adding 1051644k swap on /dev/sda1. Priority:0 extents:1
across:1051644k
[ 11.354278] md: bind<sda4>
[ 11.418756] Adding 1051644k swap on /dev/sdb1. Priority:0 extents:1
across:1051644k
[ 11.515482] nvidia 0000:03:00.0: PCI INT A -> Link[APC5] -> GSI 16 (level,
low) -> IRQ 16
[ 11.515492] nvidia 0000:03:00.0: setting latency timer to 64
[ 11.515498] vgaarb: device changed decodes:
PCI:0000:03:00.0,olddecodes=io+mem,decodes=none:owns=io+mem
[ 11.515806] NVRM: loading NVIDIA UNIX x86_64 Kernel Module 295.59 Wed Jun
6 21:19:40 PDT 2012
[ 11.550355] md: could not open unknown-block(8,20).
[ 11.550455] md: md_import_device returned -16
[ 11.550766] md: could not open unknown-block(8,20).
[ 11.550857] md: md_import_device returned -16
[ 11.601393] boot.md[448]: Starting MD RAID mdadm: /dev/md/1 is already in
use.
[ 11.601940] boot.md[448]: ..failed
[ 11.602543] systemd[1]: md.service: control process exited, code=exited
status=1
[ 11.608358] systemd[1]: Unit md.service entered failed state.
[ 97.101581] systemd[1]: Job dev-md1.device/start timed out.
[ 97.101819] systemd[1]: Job remote-fs-pre.target/start failed with result
'dependency'.
[ 97.101826] systemd[1]: Job local-fs.target/start failed with result
'dependency'.
[ 97.101831] systemd[1]: Triggering OnFailure= dependencies of
local-fs.target.
[ 97.102766] systemd[1]: Job home.mount/start failed with result
'dependency'.
[ 97.102774] systemd[1]: Job dev-md1.device/start failed with result
'timeout'.
[ 97.390477] systemd[1]: Startup finished in 5s 50ms 326us (kernel) + 1min
32s 340ms 36us (userspace) = 1min 37s 390ms 362us.
[ 351.569324] md/raid1:md1: active with 1 out of 2 mirrors
[ 351.569509] created bitmap (4 pages) for device md1
[ 351.569729] md1: bitmap initialized from disk: read 1/1 pages, set 7 of 6701
bits
[ 351.605682] md1: detected capacity change from 0 to 449637638144
[ 369.175955] md1: unknown partition table
But the individual disks of the array actually were fine:
/dev/sda4:
Magic : a92b4efc
Version : 1.0
Feature Map : 0x1
Array UUID : 909d58d0:3a4ee94e:8897cfe8:d7aefeea
Name : linux-99ig:1
Creation Time : Fri Oct 21 21:36:33 2011
Raid Level : raid1
Raid Devices : 2
Avail Dev Size : 878198512 (418.76 GiB 449.64 GB)
Array Size : 878198512 (418.76 GiB 449.64 GB)
Super Offset : 878198768 sectors
State : clean
Device UUID : 82cdb9ef:19aaa29b:1d7b1d7c:ea687817
Internal Bitmap : -8 sectors from superblock
Update Time : Mon Aug 13 22:46:08 2012
Checksum : d62737a5 - correct
Events : 93354
Device Role : Active device 0
Array State : AA ('A' == active, '.' == missing)
/dev/sdb4:
Magic : a92b4efc
Version : 1.0
Feature Map : 0x1
Array UUID : 909d58d0:3a4ee94e:8897cfe8:d7aefeea
Name : linux-99ig:1
Creation Time : Fri Oct 21 21:36:33 2011
Raid Level : raid1
Raid Devices : 2
Avail Dev Size : 878198512 (418.76 GiB 449.64 GB)
Array Size : 878198512 (418.76 GiB 449.64 GB)
Super Offset : 878198768 sectors
State : clean
Device UUID : 46360291:b7806b6c:ce1f892e:fa56fc78
Internal Bitmap : -8 sectors from superblock
Update Time : Mon Aug 13 22:46:08 2012
Checksum : 5c2809c9 - correct
Events : 93354
Device Role : Active device 1
Array State : AA ('A' == active, '.' == missing)
"mdadm --run /dev/md1" started the array
"mdadm /dev/md1 --add /dev/sdb4" fixed the array and it works well again
That the array is degraded happens only on reboot. Mostly sdb4 is missing
but i also had sda4 (md1) or sda2 or sdb2 (md0)
Always just one partition!
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