[Bug 941874] Re: (fakeraid) root device not activated during boot
Ken Persing
ken at persing.net
Mon Mar 19 02:47:14 UTC 2012
OK, no idea if this will help, but when I get thrown into initramfs,
when running 'dmraid -ay', it says the raid volume is already activated,
but in /dev I only have the raided drive (dm-0) and not any of the
partitions (dm-1 and dm-2). Booting from a rescue disk, I have the same
problem and after running kpartx (iirc, kpartx -a /dev/dm-0, I'm not in
front of my pc), the devices appear and can be mounted.
So, if the dmraid udev tool is supposed to take care of running
kpartx... it's not working.
btw, drives are running under "isw : Intel Software RAID" (4x120gb
agility 3s, sda-sdd), so I'm not sure if I'm affected by the lack of awk
and sed hooks as martin pointed out earlier...
Cheers,
Ken
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https://bugs.launchpad.net/bugs/941874
Title:
(fakeraid) root device not activated during boot
Status in “dmraid” package in Ubuntu:
Fix Released
Status in “multipath-tools” package in Ubuntu:
Incomplete
Bug description:
I have installed Precise Pangolin Alpha 2 to a fakeraid stripe, but
ubuntu fails to boot after install. When choosing recovery option, the
boot process times out waiting for root device and drops to busybox
shell. Running "dmraid -ay" and exiting busybox resumes boot and it
continues normally.
---
The problems are:
* There are no initramfs hooks for kpartx, so kpartx is not available during boot.
the following files are needed:
/sbin/kpartx
/lib/udev/kpartx_id
/lib/udev/dmsetup_env
/lib/udev/rules.d/95-kpartx.rules
* The hook for dmraid udev rules is wrong:
The script /usr/share/initramfs-tools/hooks/dmraid
tries to add:
/lib/udev/rules.d/85-dmraid.rules
but the existing file is called:
/lib/udev/rules.d/97-dmraid.rules
After fixing the above two issues, system boots normally.
* dmraid-activate is sometimes called with full device name
dmraid-activate expecte device name withouth "/dev/", e.g. "sda" not "/dev/sda". However the script
/usr/share/initramfs-tools/scripts/local-top/dmraid
calls dmraid-activate using the full device name and path.
* There might also be antoher bug on line 100 in dmraid-activate (in the awk script):
# Heximal to decimal conversion array
for (i = 0; i <= 9; i++) hex2dec[i] = i
hex2dec["a"] = 10; hex2dec["b"] = 11; hex2dec["c"] = 12
hex2dec["e"] = 13; hex2dec["d"] = 14; hex2dec["f"] = 15;
Element "e" and "d" appears to have been switched. I'm not entirely sure what the script is trying to do though, and that part of the script does not affect my system.
---
ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: dmraid 1.0.0.rc16-4.1ubuntu6 [modified: sbin/dmraid-activate usr/share/initramfs-tools/scripts/local-top/dmraid]
ProcVersionSignature: Ubuntu 3.2.0-17.26-generic 3.2.6
Uname: Linux 3.2.0-17-generic x86_64
NonfreeKernelModules: fglrx
ApportVersion: 1.93-0ubuntu2
Architecture: amd64
Date: Mon Feb 27 12:59:55 2012
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Alpha amd64 (20120201.2)
ProcEnviron:
PATH=(custom, user)
LANG=sv_SE.UTF-8
SHELL=/bin/bash
SourcePackage: dmraid
UpgradeStatus: Upgraded to precise on 2012-02-21 (5 days ago)
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