See https://bugs.launchpad.net/ubuntu/+source/lvm2/+bug/1351528
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Title:
booting from raid in degraded mode ends in endless loop
To manage
Today a disk did not come up anymore in the morning and I just noticed that the
bug is not fixed yet in mdadm-3.2.5-5ubuntu4.1.
In fact, it got worse bootdegraded=yes is now default (ubuntu 14.04) and
cannot be disabled anymore and so the system stays in an endless loop of
mdadm: CREATE group
I did not file a new bug only because it was a system that I was sending
off for production use and I stuck with the non-LVM RAID for
reliability. I could attempt reproduction on another system, but I'm
pretty sure it will happen on any system with the steps I described.
Note that I didn't
Okay, I'll do it.
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Title:
booting from raid in degraded mode ends in endless loop
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So, brand new Ubuntu 14.04 and, impossible to boot it in degraded
mode...
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I just install a server with:
/dev/sda1 = /dev/md0 = /boot
/dev/sda2 = /dev/md1 = LVM VG: vg01 = LVM LV: swap / LVM LV: root (ext4)
/dev/sdb not present.
Installation finishes without any problem, system doesn't
Brian Morton (rokclimb15) Thiago Martins (martinx) please open new
bugs about your issues.
We have automatic testing of RAID installations and degraded-boot
testing. However I do not believe we test actually performing the
installation degraded. I will check our test scenarios and test the
I think LVM2 is related here as Stefan suggests. I have a 2 disk RAID1
with LVM, 1 PV (the RAID 1), 1 VG, 2 LVs (one for root, one for swap).
I experience the same problem as Bernd.
I'm going to attempt the same setup without LVM and see if it works
properly.
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You received this bug
Rebuilt my server with no LVM, just 2 drive RAID1 for root and another
for swap with ext4 FS. Failed each disk individually and rebooted with
no problems, then resynced. I think LVM certainly plays a role in this
bug.
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this is *not* a duplicate (of bug #728435) as bernd wrote.
i am not entirely sure, because in my case i am also suffering from another
crypto-related bug, but i think lvm2 might be involved too:
mountroot_fail() in /usr/share/initramfs-tools/scripts/init-
premount/lvm2 does never return 0
It also affects ubuntu server 13.04 64bit with raid5 device.
I think this bug should be classified 'High importance' cause it prevent server
usage until the raid device is completely rebuilt.
In my configuration with 3 x 3Tb discs in raid 5 the complete rebuild can take
8 hours at standard
** Package changed: initramfs-tools (Ubuntu) = mdadm (Ubuntu)
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Title:
booting from raid in degraded mode ends in endless loop
To manage
This is probably a duplicate of
raid1 boot degraded mode fails Bug #728435
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Title:
booting from raid in degraded mode ends in endless loop
To
I'm not so sure about that, without bootdegraded=yes it drops me to the shell
and I only need to exit from that shell to continue to boot - the md-raid is
already assembled then.
I really don't see a reason why the boot script should assemble differently
with or without bootdegraded=yes. If at
I was using this feature successfuly with 11.04 alternate. Right now I
decided to upgrade to 12.04 LTS. It was frustrating to see that this is
not working. I've then checked 12.10 and it's also not working.'
There was some other bug report
I just checked that it got broken between 11.10 and 12.04 release. So if
there's someone capable of checking what versions of mdadm and
initramfs-tools do these two distribution have, then maybe it leads to
the solution.
One thing I noticed from a user perspective is that 11.10 installer
This feature is 4 year old, I can't belive it still broken. I hit the
same issue just now. Why is it so hard to boot a system in degraded
mode. It should be a variable check to deterine if to keep booting or
not. holy cow.
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Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: initramfs-tools (Ubuntu)
Status: New = Confirmed
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