[4487] in linux-scsi channel archive
AIC7XXX + MD RAID0 at Alpha are sure-fire receipe for a hang...
daemon@ATHENA.MIT.EDU (Matti Aarnio)
Fri Jul 31 18:40:46 1998
To: linux-raid@vger.rutgers.edu, linux-scsi@vger.rutgers.edu
Date: Sat, 1 Aug 1998 01:35:09 +0300 (EEST)
From: Matti Aarnio <matti.aarnio@sonera.fi>
Hello,
Lately (since perhaps kernels 2.1.90+) I have seen occasional error
events in the 'dmesg' (and at console) of following type:
(On the other hand, they appeared right at, or soon after I installed
the second disk into this system..)
scsi : aborting command due to timeout : pid 134733, scsi 0 channel 0 ...
This one is actually a copy of a real event.
This PID value is nonsense for a Linux PID (unless that is pid + 2*2^16,
which looks like some flag..)
Anyway, I have installed Eric Troan's lattest raidtools-0.50beta2
tools into the system (DEC PWS 433a - an Alpha running lattest Linux
development kernel) (raidtools needs a few patches to compile
correctly at Alpha, though..)
I have AIC7XXX driver driving:
Adapter Configuration:
SCSI Adapter: Adaptec AHA-294X Ultra SCSI host adapter
Ultra Wide Controller
With these disks:
# cat /proc/scsi/scsi
Attached devices:
Host: scsi0 Channel: 00 Id: 00 Lun: 00
Vendor: DEC Model: RZ1BB-BS (C) DEC Rev: 0658
Type: Direct-Access ANSI SCSI revision: 02
Host: scsi0 Channel: 00 Id: 01 Lun: 00
Vendor: DEC Model: RZ1CC-BA (C) DEC Rev: 880F
Type: Direct-Access ANSI SCSI revision: 02
Host: scsi0 Channel: 00 Id: 02 Lun: 00
Vendor: QUANTUM Model: VIKING II 9.1WLS Rev: 4110
Type: Direct-Access ANSI SCSI revision: 02
Host: scsi0 Channel: 00 Id: 04 Lun: 00
Vendor: QUANTUM Model: VIKING II 9.1WLS Rev: 4110
Type: Direct-Access ANSI SCSI revision: 02
These last two I try to get into a RAID0 stripe set with following
/etc/raidtab setup:
# ------- /usr/src ----- RAID0 ------
raiddev /dev/md0
raid-level 0
nr-raid-disks 2
nr-spare-disks 0
device /dev/sdc2
raid-disk 0
device /dev/sdd2
raid-disk 1
On the /dev/md0 I have created an EXT2 filesystem (whopping 18 GB),
and when I try to copy data into there, I do get sooner or latter
error messages repeating same set of timed-out blocks over and over
again.
Next I will try AIC7XXX driver 5.1.0pre5 to see if that helps anything.
Good ideas are welcome,
/Matti Aarnio <matti.aarnio@sonera.fi>
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