On 09/12/13 11:38, David C. Rankin wrote:
On 12/08/2013 11:57 AM, David C. Rankin wrote:
On 12/08/2013 04:57 AM, Mikael Abrahamsson wrote:
On Sun, 8 Dec 2013, David C. Rankin wrote:
Guys,
I have an older box that is a fax server where the Event Count for /dev/md1 is
off by 1, but the array cannot be reassembled with --assemble --force /dev/dm1
/dev/sda5 /dev/sdb5.
Here is additional information with --verbose given:
Have you tried this:
mdadm --verbose --assemble /dev/md1 /dev/sdb5
mdadm --manage /dev/md1 --run
Being raid1, you should be able to use only a single device....
BTW, chances to recover your data should be exceptional, as long as you
don't do anything too silly. You should even be able to mount the device
directly (read-only):
mount -o ro /dev/sdb5 /mnt
(Depending on the content is a filesystem).
Then you can just backup the data, create a new array, and restore the
data. Depending on data and size this might even be a better option...
Here is the --detail and --examine information for the drives for completeness:
nemtemp:~ # mdadm --detail /dev/md1
/dev/md1:
Version : 01.00.03
Creation Time : Thu Aug 21 06:43:22 2008
Raid Level : raid1
Used Dev Size : 20972752 (20.00 GiB 21.48 GB)
Raid Devices : 2
Total Devices : 2
Preferred Minor : 1
Persistence : Superblock is persistent
Update Time : Tue Nov 19 15:28:38 2013
State : active, Not Started
Active Devices : 2
Working Devices : 2
Failed Devices : 0
Spare Devices : 0
Name : 1
UUID : e45cfbeb:77c2b93b:43d3d214:390d0f25
Events : 148
Number Major Minor RaidDevice State
0 8 5 0 active sync /dev/sda5
1 8 21 1 active sync /dev/sdb5
nemtemp:/ # mdadm -E /dev/sda5
/dev/sda5:
Magic : a92b4efc
Version : 1.0
Feature Map : 0x1
Array UUID : e45cfbeb:77c2b93b:43d3d214:390d0f25
Name : 1
Creation Time : Thu Aug 21 06:43:22 2008
Raid Level : raid1
Raid Devices : 2
Avail Dev Size : 41945504 (20.00 GiB 21.48 GB)
Array Size : 41945504 (20.00 GiB 21.48 GB)
Super Offset : 41945632 sectors
State : clean
Device UUID : e0c1c580:db4d853e:6fac1c8f:fb5399d7
Internal Bitmap : -81 sectors from superblock
Update Time : Tue Nov 19 15:28:38 2013
Checksum : d37d1086 - correct
Events : 148
Array Slot : 0 (0, 1)
Array State : Uu
nemtemp:/ # mdadm -E /dev/sdb5
/dev/sdb5:
Magic : a92b4efc
Version : 1.0
Feature Map : 0x1
Array UUID : e45cfbeb:77c2b93b:43d3d214:390d0f25
Name : 1
Creation Time : Thu Aug 21 06:43:22 2008
Raid Level : raid1
Raid Devices : 2
Avail Dev Size : 41945504 (20.00 GiB 21.48 GB)
Array Size : 41945504 (20.00 GiB 21.48 GB)
Super Offset : 41945632 sectors
State : active
Device UUID : 6edfa3f8:c8c4316d:66c19315:5eda0911
Internal Bitmap : -81 sectors from superblock
Update Time : Tue Nov 19 15:28:38 2013
Checksum : 39ef40a5 - correct
Events : 149
Array Slot : 1 (0, 1)
Array State : uU
BTW, the bitmap location looks.... strange...
Regards,
Adam
--
Adam Goryachev Website Managers www.websitemanagers.com.au
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