[clue-tech] RAIDdle me this Batman...

[mike havlicek]

--- On Wed, 3/18/09, David L. Willson <DLWillson at TheGeek.NU> wrote:


> From: David L. Willson <DLWillson at TheGeek.NU>
> Subject: Re: [clue-tech] RAIDdle me this Batman...
> To: khellman at mcprogramming.com, "CLUE technical discussion" <clue-tech at cluedenver.org>
> Date: Wednesday, March 18, 2009, 1:07 PM
> Keith,
> 
> I don't know whether RAID layouts are same/similar across
> hardware.  I'd guess not, with enough confidence not to
> spend the time it would take to find out for sure.  Can
> I suggest a possible solution anyway?
> 
> 1) grab a drive that's larger than the mirror members
> 
Which piece of hardware failed?

RAID 0 is not mirroring. If a drive failed he is probably toast.



> 2) attach the large drive and a working member of the
> mirror set to a box running a recent version of Linux
> 
> 3) dd the mirror member disc to the larger drive (whole
> disc, ie: dd if=/dev/sda of=/dev/sdb conv=noerror,null)
> 
> 4) detach the mirror member
> 
> 5) update the in-memory partition tables (partprobe)
> 
> 6) try using mdadm commands to detect/repair/forcibly start
> the borken mirror copy on the large drive
> 
> Failing that, eBay up another of those firewire boxes.
> 
> David L. Willson
> Trainer, Engineer, Enthusiast
> MCT, MCSE, Linux+
> tel://720.333.LANS
> Freeing people from the tyranny (or whatevery) of
> Microsofty-ness, one at a time.
> 
> ----- "Keith Hellman" <khellman at mcprogramming.com>
> wrote:
> 
> > Hello all.  I've got a friend who has had an old
> firewire device
> > fail on him.  My understanding is that it is a
> NAS like device, uses
> > RAID0, but it just uses firewire instead of ether.
> > 
> > So, it's failed, and he would (of course) like to get
> some data off
> > the
> > drives.  He has backups, but they are a week old
> and that last week
> > is
> > the killer.
> > 
> > Here is my question:  is the block layout of RAID
> drives
> > standardized?
> > Can we throw these two drives onto *any* RAID0 capable
> controller
> > (perhaps even Linux software raid?) and get the file
> system back?
> > 
> > Or do we have to find to find a box/mobo with the same
> RAID
> > controller?

The latter would be my guess. ??Put the set in and copy configuration from the disks to the replacement controller?? That would be interesting if vendor A's tools were compatible with vendor B's.


-Mike
> > 
> > TIA for the help,
> > -- 
> > Keith Hellman           
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