Subject: Re: SDLT 320 Tape Drive on -current
To: Duncan McEwan <duncan@mcs.vuw.ac.nz>
From: Manuel Bouyer <bouyer@antioche.eu.org>
List: current-users
Date: 09/11/2003 21:48:13
On Tue, Sep 09, 2003 at 05:58:01PM +1200, Duncan McEwan wrote:
> [...]
>
> st0(ahc0:0:6:0): Check Condition on CDB: 0x00 00 00 00 00 00
> SENSE KEY: Hardware Error
> ASC/ASCQ: Diagnostic Failure on Component 0x84
The hardware vendor can probably tell you more about this.
If the drive is still under waranty, I would call the vendor and tell them
about this one, at last.
>
> st0(ahc0:0:6:0): Check Condition on CDB: 0x11 01 00 00 46 00
> SENSE KEY: Media Error
> INFO FIELD: 15
> COMMAND INFO: 163931 (0x2805b)
> ASC/ASCQ: Recorded Entity Not Found
>
> st0(ahc0:0:6:0): Check Condition on CDB: 0x08 00 00 02 00 00
> SENSE KEY: Media Error
> INFO FIELD: 512
> COMMAND INFO: 163931 (0x2805b)
> ASC/ASCQ: Positioning Error Detected By Read of Medium
>
> Perhaps some of these could have been caused by previous write operations
> failing and so the data on the tape is incorrect (ie: no end of tape marker,
> etc).
>
> As well we also now occasionally get a different error that causes the kernel
> to generate a scsi card register dump and causes the program that was accessing
> the tape drive to block in the kernel in an unkillable state. We actually
> have to power cycle the machine in order to get the scsi controller working
> again. The register dump is 103 lines long so I won't include it in this
> message, but if you want to see it you can get it from
>
> http://www.mcs.vuw.ac.nz/~duncan/ahc-dump.txt
This is probably caused by the drive misbehaving too (which causes the command
to timeout)
>
> So at this stage I'm still not sure whether we are looking at a (second)
> faulty tape drive (or scsi controller) or whether there are perhaps problems
> with the NetBSD ahc or st drivers. Any advice would be gratefully accepted!
This really looks like as a hardware problem on the drive side again
I can't see how a faulty driver could cause such coherent SCSI sense messages.
--
Manuel Bouyer <bouyer@antioche.eu.org>
NetBSD: 24 ans d'experience feront toujours la difference
--