On Tue, Dec 08, 2009 at 11:48:18AM -0500, Lucian Șandor wrote:
>
> Now, I am trying to re-create the array in the proper order. It takes
> me countless attempts, through hundreds of permutations. I am doing it
> programatically, but I don't think I have the right tool.
Something that may help is to use the findsuper program, in the
e2fsprogs sources; it's not built by default, but you can build it by
hand. Each of the backup superblocks has a group number in one of the
fields, if it was created with a relatively modern mke2fs, so you can
use it to get information like this:
byte_offset byte_start byte_end fs_blocks blksz grp last_mount_time sb_uuid label
1024 0 95999229952 23437312 4096 0 Thu Dec 10 00:24:39 2009 fd5210bd
134217728 0 95999229952 23437312 4096 1 Wed Dec 31 19:00:00 1969 fd5210bd
402653184 0 95999229952 23437312 4096 3 Wed Dec 31 19:00:00 1969 fd5210bd
671088640 0 95999229952 23437312 4096 5 Wed Dec 31 19:00:00 1969 fd5210bd
The group number information should help you determine the order of the
disks in the raid array.
Good luck!
- Ted
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