[3533] in linux-scsi channel archive
Re: SMP 2.1.90-pre3 SCSI kernel panic
daemon@ATHENA.MIT.EDU (sistema@readysoft.es)
Mon Mar 16 07:52:19 1998
Date: Mon, 16 Mar 1998 13:48:52 +0100 (MET)
From: sistema@readysoft.es
To: eowmob@exp-math.uni-essen.de
cc: dledford@dialnet.net, linux-scsi@vger.rutgers.edu
In-Reply-To: <Pine.A32.3.95.980316123704.73576D-100000@werner.exp-math.uni-essen.de>
On 16 Mar, Michael Weller wrote:
> On Mon, 16 Mar 1998, Doug Ledford wrote:
>
>> automatically remap bad sectors out on the fly with those bits set. An
>> alarmingly large number of SCSI drives these days ship with this bits turned
>> off.
>
> Let me add that an (IMHO even more) alarmingly large number of SCSI drives
> these days ships with AWRE and ARRE bits enabled BUT NO SPARE sectors
> configured to be used to backup failing disk parts, hence redering this
> feature useless (but increasing the disk capacity by those sectors which
> is probably the reason why it is done). Again, scsiinfo can fix it, and I
> added a few lines to the docs of scsiinfo-1.7 telling you what to do.
>
> This 'format modification' is actually what requries the low-level format.
> AWRE and ARRE can be changed w/o a low-level format.
Ok. Iīve already activated remapping bits, running 2.0.33.
But Iīve been able to backup all scsi devices with no read error many
times and keep on working. No SCSI errors.
Why does 2.1.89 and over generate so many failures doing exactly the
same? It doesnīt look as a hardware problem. Maybe itīs an SMP issue or
a scsi problem. I would discard HD errors.
Thanks
Pau
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