Re: Starting point of the actual RAID data area

[Nix]

On 8 Oct 2006, Daniel Pittman said:
 Jyri Hovila [EMAIL PROTECTED] writes:
 I would appreciate it a lot if somebody could give me a hand here. All
 I need to understand right now is how I can find out the first sector
 of the actual RAID data. I'm starting with a simple configuration,
 where there are three identical drives, all of them used fully for one
 RAID 5 set. And no LVM at this point.
 
 It would start on the first sector of the first disk.

That depends on the superblock version. Versions 0.9x and 1.0 will do as
you say, but versions 1.1 and 1.2 will have the start of the disk
holding either the RAID superblock (for 1.1) or 4Kb of nothing (for
1.2).

-- 
`In typical emacs fashion, it is both absurdly ornate and
 still not really what one wanted.' --- jdev
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Starting point of the actual RAID data area

[Jyri Hovila]

Hello, world!

I'm experimenting with Linux software RAID recovery. My target is to  
be able to recover RAID 5 from individual drives without using the  
Linux RAID tools - I mean mdadm and the others. I know it's not the  
easiest way, but I *do* need to figure out a way to recover Linux  
RAID using Windows... Sorry... ;)


What I'd like to know is how can I find where the actual RAID data  
area starts on disks participating in a RAID 5 set. I know most of  
the RAID configuration information is stored on all of the drives,  
but I'm not geek enough to learn how it's stored from the RAID source  
code.


I would appreciate it a lot if somebody could give me a hand here.  
All I need to understand right now is how I can find out the first  
sector of the actual RAID data. I'm starting with a simple  
configuration, where there are three identical drives, all of them  
used fully for one RAID 5 set. And no LVM at this point.


All comments and ideas are warmly welcome.

Thanks in advance!

Yours,

Jyri

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