On Thu, Nov 28, 2002 at 12:51:38PM -0800, Andrew Naito wrote:
> Environment:
> NetBSD running on i386 with Adaptec 7890 SCSI controller and Chaparral K5412
> hardware RAID controller.
> 
> Problem Description:
> I'm attempting to backup a 4 drive RAID 5 array that was built on the K5412. 
> The drive is mounted as /dev/sd0g.  Each time I've attempted to perform a dump
> to a Quantum DLT7000, I've received the error message:
> 
> DUMP: bad sblock magic number
> 
> Does anyone know how I can perform a dump of the RAID partition?  Does anyone
> have experience with hardware RAID partitions?  I've searched using the
> parameters "hardware RAID dump", but I couldn't find anything useful (besides
> an e-mail post by Chris Jones about using a CMD external RAID controller).

An external hardware RAID is, from the OS point of view, just like a
SCSI disk, so you shouldn't need anything special.

So either the RAID has corrupted data for the superblock (but in this case
the os would probably have troubles mounting it) or there is a bug
somewhere.
how big is sd0g ?
What dump command are you using ?
What does 'fsck -fn /dev/rsd0g' say ?

-- 
Manuel Bouyer <bouyer@antioche.eu.org>
     NetBSD: 23 ans d'experience feront toujours la difference
--