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Message #36847
[Bug 974275] Re: md trancates devices with kernel 2.6.32-40-server
annunaki2k2, the next step is to fully commit bisect from Ubuntu kernel
2.6.32-36 to 2.6.32-37, in order to identify the offending commit. Could
you please do this following
https://wiki.ubuntu.com/Kernel/KernelBisection ?
** Description changed:
- After updating the to kernel 2.6.32-40-server (from 2.6.32-33-server),
- our MD device decided to show up as only a fraction of it's previous
- size.
+ After updating the kernel to one >=2.6.32-37 our MD device decided to
+ show up as only a fraction of it's previous size.
With the previous kernel, md0 shows up (correctly) as 85681.66 GiB, but
with the newer kernel it shows up as only 8192.00 GiB - a serious order
of magnitude different! Needless to say, with the incorrect size being
reported/used, the md device is unusable and prevents access to the
partitions on it.
Whilst running 2.6.32-33-server:
root@saturn:~# mdadm --detail /dev/md0
/dev/md0:
- Version : 00.90
- Creation Time : Mon Aug 9 09:15:41 2010
- Raid Level : raid0
- Array Size : 89843731712 (85681.66 GiB 91999.98 GB)
- Raid Devices : 2
- Total Devices : 2
+ Version : 00.90
+ Creation Time : Mon Aug 9 09:15:41 2010
+ Raid Level : raid0
+ Array Size : 89843731712 (85681.66 GiB 91999.98 GB)
+ Raid Devices : 2
+ Total Devices : 2
Preferred Minor : 0
- Persistence : Superblock is persistent
+ Persistence : Superblock is persistent
- Update Time : Mon Aug 9 09:15:41 2010
- State : clean
- Active Devices : 2
+ Update Time : Mon Aug 9 09:15:41 2010
+ State : clean
+ Active Devices : 2
Working Devices : 2
- Failed Devices : 0
- Spare Devices : 0
+ Failed Devices : 0
+ Spare Devices : 0
- Chunk Size : 128K
+ Chunk Size : 128K
- UUID : 1c27f277:0fbb69c8:852484a6:e390a598 (local to host saturn)
- Events : 0.1
+ UUID : 1c27f277:0fbb69c8:852484a6:e390a598 (local to host saturn)
+ Events : 0.1
- Number Major Minor RaidDevice State
- 0 8 32 0 active sync /dev/sdc
- 1 8 48 1 active sync /dev/sdd
- root@saturn:~# cat /proc/partitions
+ Number Major Minor RaidDevice State
+ 0 8 32 0 active sync /dev/sdc
+ 1 8 48 1 active sync /dev/sdd
+ root@saturn:~# cat /proc/partitions
major minor #blocks name
- 8 0 488386584 sda
- 8 1 468581376 sda1
- 8 2 1 sda2
- 8 5 19803136 sda5
- 8 16 488386584 sdb
- 8 17 468581376 sdb1
- 8 18 1 sdb2
- 8 21 19803136 sdb5
- 8 32 44921865984 sdc
- 9 2 468581312 md2
- 8 48 44921865984 sdd
- 9 0 89843731712 md0
- 259 0 89843731200 md0p1
+ 8 0 488386584 sda
+ 8 1 468581376 sda1
+ 8 2 1 sda2
+ 8 5 19803136 sda5
+ 8 16 488386584 sdb
+ 8 17 468581376 sdb1
+ 8 18 1 sdb2
+ 8 21 19803136 sdb5
+ 8 32 44921865984 sdc
+ 9 2 468581312 md2
+ 8 48 44921865984 sdd
+ 9 0 89843731712 md0
+ 259 0 89843731200 md0p1
root@saturn:~# fdisk -l /dev/md0
WARNING: GPT (GUID Partition Table) detected on '/dev/md0'! The util
fdisk doesn't support GPT. Use GNU Parted.
-
Disk /dev/md0: 92000.0 GB, 91999981273088 bytes
255 heads, 63 sectors/track, 11185027 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 131072 bytes / 262144 bytes
Disk identifier: 0x00000000
- Device Boot Start End Blocks Id System
+ Device Boot Start End Blocks Id System
/dev/md0p1 1 267350 2147483647+ ee GPT
Partition 1 does not start on physical sector boundary.
-
But whilst running 2.6.32-40-server:
root@saturn:~# mdadm --detail /dev/md0
/dev/md0:
- Version : 00.90
- Creation Time : Mon Aug 9 09:15:41 2010
- Raid Level : raid0
- Array Size : 8589934336 (8192.00 GiB 8796.09 GB)
- Raid Devices : 2
- Total Devices : 2
+ Version : 00.90
+ Creation Time : Mon Aug 9 09:15:41 2010
+ Raid Level : raid0
+ Array Size : 8589934336 (8192.00 GiB 8796.09 GB)
+ Raid Devices : 2
+ Total Devices : 2
Preferred Minor : 0
- Persistence : Superblock is persistent
+ Persistence : Superblock is persistent
- Update Time : Mon Aug 9 09:15:41 2010
- State : clean
- Active Devices : 2
+ Update Time : Mon Aug 9 09:15:41 2010
+ State : clean
+ Active Devices : 2
Working Devices : 2
- Failed Devices : 0
- Spare Devices : 0
+ Failed Devices : 0
+ Spare Devices : 0
- Chunk Size : 128K
+ Chunk Size : 128K
- UUID : 1c27f277:0fbb69c8:852484a6:e390a598 (local to host saturn)
- Events : 0.1
+ UUID : 1c27f277:0fbb69c8:852484a6:e390a598 (local to host saturn)
+ Events : 0.1
- Number Major Minor RaidDevice State
- 0 8 32 0 active sync /dev/sdc
- 1 8 48 1 active sync /dev/sdd
- root@saturn:~# cat /proc/partitions
+ Number Major Minor RaidDevice State
+ 0 8 32 0 active sync /dev/sdc
+ 1 8 48 1 active sync /dev/sdd
+ root@saturn:~# cat /proc/partitions
major minor #blocks name
- 8 0 488386584 sda
- 8 1 468581376 sda1
- 8 2 1 sda2
- 8 5 19803136 sda5
- 8 16 488386584 sdb
- 8 17 468581376 sdb1
- 8 18 1 sdb2
- 8 21 19803136 sdb5
- 8 48 44921865984 sdd
- 8 32 44921865984 sdc
- 9 2 468581312 md2
- 9 0 8589934336 md0
+ 8 0 488386584 sda
+ 8 1 468581376 sda1
+ 8 2 1 sda2
+ 8 5 19803136 sda5
+ 8 16 488386584 sdb
+ 8 17 468581376 sdb1
+ 8 18 1 sdb2
+ 8 21 19803136 sdb5
+ 8 48 44921865984 sdd
+ 8 32 44921865984 sdc
+ 9 2 468581312 md2
+ 9 0 8589934336 md0
root@saturn:~# fdisk -l /dev/md0
WARNING: GPT (GUID Partition Table) detected on '/dev/md0'! The util
fdisk doesn't support GPT. Use GNU Parted.
-
Disk /dev/md0: 8796.1 GB, 8796092760064 bytes
255 heads, 63 sectors/track, 1069397 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 131072 bytes / 262144 bytes
Disk identifier: 0x00000000
- Device Boot Start End Blocks Id System
+ Device Boot Start End Blocks Id System
/dev/md0p1 1 267350 2147483647+ ee GPT
Partition 1 does not start on physical sector boundary.
-
- This is a major bug introduced on (what should be) a mature LTS release, and will need addressing ASAP.
+ This is a major bug introduced on (what should be) a mature LTS release,
+ and will need addressing ASAP.
** Changed in: linux (Ubuntu)
Status: Confirmed => Incomplete
** Summary changed:
- md trancates devices with kernel 2.6.32-40-server
+ md trancates devices with kernel >=2.6.32-37-server
--
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https://bugs.launchpad.net/bugs/974275
Title:
md trancates devices with kernel >=2.6.32-37-server
Status in “linux” package in Ubuntu:
Incomplete
Bug description:
After updating the kernel to one >=2.6.32-37 our MD device decided to
show up as only a fraction of it's previous size.
With the previous kernel, md0 shows up (correctly) as 85681.66 GiB,
but with the newer kernel it shows up as only 8192.00 GiB - a serious
order of magnitude different! Needless to say, with the incorrect size
being reported/used, the md device is unusable and prevents access to
the partitions on it.
Whilst running 2.6.32-33-server:
root@saturn:~# mdadm --detail /dev/md0
/dev/md0:
Version : 00.90
Creation Time : Mon Aug 9 09:15:41 2010
Raid Level : raid0
Array Size : 89843731712 (85681.66 GiB 91999.98 GB)
Raid Devices : 2
Total Devices : 2
Preferred Minor : 0
Persistence : Superblock is persistent
Update Time : Mon Aug 9 09:15:41 2010
State : clean
Active Devices : 2
Working Devices : 2
Failed Devices : 0
Spare Devices : 0
Chunk Size : 128K
UUID : 1c27f277:0fbb69c8:852484a6:e390a598 (local to host saturn)
Events : 0.1
Number Major Minor RaidDevice State
0 8 32 0 active sync /dev/sdc
1 8 48 1 active sync /dev/sdd
root@saturn:~# cat /proc/partitions
major minor #blocks name
8 0 488386584 sda
8 1 468581376 sda1
8 2 1 sda2
8 5 19803136 sda5
8 16 488386584 sdb
8 17 468581376 sdb1
8 18 1 sdb2
8 21 19803136 sdb5
8 32 44921865984 sdc
9 2 468581312 md2
8 48 44921865984 sdd
9 0 89843731712 md0
259 0 89843731200 md0p1
root@saturn:~# fdisk -l /dev/md0
WARNING: GPT (GUID Partition Table) detected on '/dev/md0'! The util
fdisk doesn't support GPT. Use GNU Parted.
Disk /dev/md0: 92000.0 GB, 91999981273088 bytes
255 heads, 63 sectors/track, 11185027 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 131072 bytes / 262144 bytes
Disk identifier: 0x00000000
Device Boot Start End Blocks Id System
/dev/md0p1 1 267350 2147483647+ ee GPT
Partition 1 does not start on physical sector boundary.
But whilst running 2.6.32-40-server:
root@saturn:~# mdadm --detail /dev/md0
/dev/md0:
Version : 00.90
Creation Time : Mon Aug 9 09:15:41 2010
Raid Level : raid0
Array Size : 8589934336 (8192.00 GiB 8796.09 GB)
Raid Devices : 2
Total Devices : 2
Preferred Minor : 0
Persistence : Superblock is persistent
Update Time : Mon Aug 9 09:15:41 2010
State : clean
Active Devices : 2
Working Devices : 2
Failed Devices : 0
Spare Devices : 0
Chunk Size : 128K
UUID : 1c27f277:0fbb69c8:852484a6:e390a598 (local to host saturn)
Events : 0.1
Number Major Minor RaidDevice State
0 8 32 0 active sync /dev/sdc
1 8 48 1 active sync /dev/sdd
root@saturn:~# cat /proc/partitions
major minor #blocks name
8 0 488386584 sda
8 1 468581376 sda1
8 2 1 sda2
8 5 19803136 sda5
8 16 488386584 sdb
8 17 468581376 sdb1
8 18 1 sdb2
8 21 19803136 sdb5
8 48 44921865984 sdd
8 32 44921865984 sdc
9 2 468581312 md2
9 0 8589934336 md0
root@saturn:~# fdisk -l /dev/md0
WARNING: GPT (GUID Partition Table) detected on '/dev/md0'! The util
fdisk doesn't support GPT. Use GNU Parted.
Disk /dev/md0: 8796.1 GB, 8796092760064 bytes
255 heads, 63 sectors/track, 1069397 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 131072 bytes / 262144 bytes
Disk identifier: 0x00000000
Device Boot Start End Blocks Id System
/dev/md0p1 1 267350 2147483647+ ee GPT
Partition 1 does not start on physical sector boundary.
This is a major bug introduced on (what should be) a mature LTS
release, and will need addressing ASAP.
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