Good afternoon.
I love that these old-school mailing lists are still around. :)
To make a long story short, today I started drilling in to why a
machine I have will boot fine on 2.6.31-22 but not on anything newer
(2.6.32-24 to 2.6.32-30)
This is a Ubuntu machine, and all the kernels are the generic models
provided by Ubuntu.
>From what I can tell (and the Ubuntu splash screens and various other
shenanigans tend to make troubleshooting more challenging than
required) the boot sequence is failing to mount the raid partition on
the newer kernels. That drops the boot to a console where one is
provided the options to keep waiting, (S)kip the mount, or (M)anually
recover (which drops to a shell). Skipping will boot the machine, but
with the array unmounted.
So something is different about how Ubuntu or the kernel is handling
the raid array between the 2.6.31-22 and all the newer kernels.
When I boot from the 31-22 kernel, the array does appear to be functional.
Machine has 3 drives: sda and sdb are identical and contain the array.
sdc is an older HD from an earlier machine that has LVM partitions on
it.
Attached is a bunch of diagnostic material. Unfortunately, I don't
have the error messages from failed boot attempts.
Any assistance would be much appreciated. I'd be happy to work
off-list and post a summary of the resolution if that helps keep the
list from being clogged up.
Thanks,
DG
---------------------------------
cat /proc/mdstat
Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5]
[raid4] [raid10]
md1 : active raid1 sda5[0] sdb5[1]
769706176 blocks [2/2] [UU]
cat /proc/partitions
major minor #blocks name
8 0 976762584 sda
8 1 207872 sda1
8 2 204796620 sda2
8 3 2048287 sda3
8 4 1 sda4
8 5 769706248 sda5
8 16 976762584 sdb
8 17 208813 sdb1
8 18 204796620 sdb2
8 19 2048287 sdb3
8 20 1 sdb4
8 21 769706248 sdb5
8 32 245117376 sdc
8 33 104391 sdc1
8 34 245007315 sdc2
9 1 769706176 md1
252 0 10223616 dm-0
252 1 153812992 dm-1
252 2 76775424 dm-2
252 3 1015808 dm-3
252 4 3145728 dm-4
sudo mdadm --detail /dev/md1
/dev/md1:
Version : 00.90
Creation Time : Sat Apr 25 08:43:26 2009
Raid Level : raid1
Array Size : 769706176 (734.05 GiB 788.18 GB)
Used Dev Size : 769706176 (734.05 GiB 788.18 GB)
Raid Devices : 2
Total Devices : 2
Preferred Minor : 1
Persistence : Superblock is persistent
Update Time : Sun Apr 3 12:06:23 2011
State : clean
Active Devices : 2
Working Devices : 2
Failed Devices : 0
Spare Devices : 0
UUID : e0cc58c7:6f841366:7a44a462:94a1d56a (local to host karzai)
Events : 0.2844822
Number Major Minor RaidDevice State
0 8 5 0 active sync /dev/sda5
1 8 21 1 active sync /dev/sdb5
sudo mdadm --examine /dev/md1
mdadm: No md superblock detected on /dev/md1.
sudo fdisk -l
Disk /dev/sda: 1000.2 GB, 1000204886016 bytes
255 heads, 63 sectors/track, 121601 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x000ac88c
Device Boot Start End Blocks Id System
/dev/sda1 * 1 26 207872 83 Linux
Partition 1 does not end on cylinder boundary.
/dev/sda2 27 25522 204796620 83 Linux
/dev/sda3 25523 25777 2048287+ 82 Linux swap / Solaris
/dev/sda4 25778 121601 769706280 5 Extended
/dev/sda5 25778 121601 769706248+ 83 Linux
Disk /dev/sdb: 1000.2 GB, 1000204886016 bytes
255 heads, 63 sectors/track, 121601 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x000d90a1
Device Boot Start End Blocks Id System
/dev/sdb1 * 1 26 208813+ 83 Linux
/dev/sdb2 27 25522 204796620 83 Linux
/dev/sdb3 25523 25777 2048287+ 82 Linux swap / Solaris
/dev/sdb4 25778 121601 769706280 5 Extended
/dev/sdb5 25778 121601 769706248+ 83 Linux
Disk /dev/sdc: 251.0 GB, 251000193024 bytes
255 heads, 63 sectors/track, 30515 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00042b0a
Device Boot Start End Blocks Id System
/dev/sdc1 * 1 13 104391 83 Linux
/dev/sdc2 14 30515 245007315 8e Linux LVM
Disk /dev/md1: 788.2 GB, 788179124224 bytes
2 heads, 4 sectors/track, 192426544 cylinders
Units = cylinders of 8 * 512 = 4096 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000
Disk /dev/md1 doesn't contain a valid partition table
cat /etc/fstab
# /etc/fstab: static file system information.
#
# Use 'vol_id --uuid' to print the universally unique identifier for a
# device; this may be used with UUID= as a more robust way to name devices
# that works even if disks are added and removed. See fstab(5).
#
# <file system> <mount point> <type> <options> <dump> <pass>
proc /proc proc defaults 0 0
# / was on /dev/sda2 during installation
UUID=0bffc411-e143-4d25-bc59-b8b9fabb788a / ext3
relatime,errors=remount-ro 0 1
# /boot was on /dev/sda1 during installation
UUID=b8f4b4ab-2e59-426e-b380-791f36ba473c /boot ext2
relatime 0 2
# /boot2 was on /dev/sdb1 during installation
UUID=e9768910-bfd5-4e04-a244-db4a2da9b215 /boot2 ext2
relatime 0 2
# /home was on /dev/sda5 during installation
#UUID=4f73e3ae-9e5d-432f-b5e4-f7c75a038c7c /home ext3
relatime 0 2
# /home installed on mdraid device by DG. Consists of /home and
/homebak partitions (/dev/sda5 and /dev/sdb5)
/dev/md1 /home ext3 relatime 0 2
# /homeback was on /dev/sdb5 during installation
#UUID=c3c02f6c-1321-4882-90c5-2623033261c5 /homeback ext3
relatime 0 2
# /sysback was on /dev/sdb2 during installation
UUID=9f3bb9ee-ee5e-48a8-bdbe-9c80561f41d0 /sysback ext3
relatime 0 2
# swap was on /dev/sda3 during installation
UUID=873b1a20-cb72-4675-9cc7-fe6ac857490d none swap sw
0 0
# swap was on /dev/sdb3 during installation
UUID=47842e22-d4be-4738-ba2a-b13332b752e9 none swap sw
0 0
/dev/scd0 /media/cdrom0 udf,iso9660 user,noauto,exec,utf8 0 0
/dev/VolGroupHDB/LogVol00 /oldhd/root ext3 defaults 1 2
/dev/VolGroupHDB/LogVol04 /oldhd/home ext3 defaults 1 2
/dev/VolGroupHDB/LogVol02 /oldhd/root/usr/local ext3 defaults 1 2
/dev/VolGroupHDB/LogVol03 /oldhd/root/var ext3 defaults 1 2
sudo vgdisplay
--- Volume group ---
VG Name VolGroupHDB
System ID
Format lvm2
Metadata Areas 1
Metadata Sequence No 8
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 5
Open LV 4
Max PV 0
Cur PV 1
Act PV 1
VG Size 233.66 GiB
PE Size 32.00 MiB
Total PE 7477
Alloc PE / Size 7476 / 233.62 GiB
Free PE / Size 1 / 32.00 MiB
VG UUID 2tI8oM-GfB9-OHgv-jQAc-D9bH-zRBK-f3dBAs
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