Re: Data Offset

[Pierre Beck <mail@pierre-beck.de>]

You specified same offset for all drives, which is wrong. Your initial 
drive setup had differing offsets - look at the examines.

In summary, we have this information:

Drive 0: offset 2048
Drive 1: offset 2048
Drive 2: offset 2048
Drive 3: offset 1024
Drive 4: -dead-

The order was also wrong. The unpartitioned drive was active device 2. 
The /dev/sdX ordering information we got is like

Drive 0: ?
Drive 1: ?
Drive 2: /dev/sde
Drive 3: ?
Drive 4: missing

That makes 3 variables. You can trial-and-error the order of drive 0, 1, 
3 but make sure the offset of drive 3 is always 1024. You'd shift 
characters only. My first try would be:

/dev/sdc3:2048s /dev/sdb3:2048s /dev/sde:2048s /dev/sdd3:1024s missing


My second try would be:

/dev/sdb3:2048s /dev/sdc3:2048s /dev/sde:2048s /dev/sdd3:1024s missing

... and so on.

And DON'T run fsck early. Try mounting read-only, take a look at your 
data. Something bigger than chunksize, like a movie file, checksum some 
iso or smth. It should be intact. THEN run fsck. fsck cannot expect raid 
stripe reordering and worst case may cause damage (not that I heard of 
it happen, but inspecting data first is safe).

Good luck,

Pierre Beck


Am 13.06.2012 08:57, schrieb freeone3000:
>   /dev/sdc3:2048s /dev/sdb3:2048s /dev/sdd3:2048s /dev/sde:2048s