On Mon, Feb 10, 2003 at 10:41:45AM +0100, Christoph Kaegi wrote:
> Dear NetBSDers
> 
> I set up RaidFrame mirroring last week one of our 
> Supermicro 6012P-6B. The have an Adaptec aic7899
> chipset onboard with two identical Seagate ST336607LC
> disks on it.
> 
> Returned today, to find the machine dead an displayin:
> 
> -------------------------------------- 8< --------------------------------------
> Feb  7 12:08:39 mx2 /netbsd: duplicate IP address 160.85.104.51 sent from link address 00:30:48:24:aa:48
> Feb  9 03:15:54 mx2 /netbsd: ahc0: WARNING no command for scb 15 (cmdcmplt)
> Feb  9 03:15:55 mx2 /netbsd: QOUTPOS = 172
> Feb  9 03:15:55 mx2 /netbsd: ahc0: WARNING no command for scb 13 (cmdcmplt)
> Feb  9 03:15:55 mx2 /netbsd: QOUTPOS = 189
> Feb 10 11:17:11 mx2 /netbsd:  Aborting I/O operation.
> Feb 10 11:17:11 mx2 /netbsd: Multiple disks failed in a single group!  Aborting I/O operation.
> Feb 10 11:17:11 mx2 last message repeated 13 times
> Feb 10 11:17:11 mx2 /netbsd: [Failed to create a DAG]
> Feb 10 11:17:11 mx2 /netbsd: panic: raidframe error at line 458 file /usr/src/NetBSD-1.6/src/sys/arch/i386/compile/MX2/.  ./../../../dev/raidframe/rf_states.c
> Feb 10 11:17:11 mx2 /netbsd: syncing disks... 
> -------------------------------------- 8< --------------------------------------
> 
> The system came up and everything could be fixed. 
> 
> The release is 1.6.1_RC1, dmesg follows further down.
> 
> What could be the cause for such a panic?

Bugs in the driver. Maybe try to disable tagged queuing:
options AHC_NO_TAGS
in your kernel config file

-- 
Manuel Bouyer <bouyer@antioche.eu.org>
     NetBSD: 24 ans d'experience feront toujours la difference
--