[4853] in linux-scsi channel archive
Re: Relocating bad sectors
daemon@ATHENA.MIT.EDU (Matthias Andree)
Fri Oct 9 12:51:35 1998
Date: Fri, 9 Oct 1998 16:50:45 +0200
From: Matthias Andree <mandree@sx1.HRZ.Uni-Dortmund.DE>
To: Linux Scsi Mailing List <linux-scsi@vger.rutgers.edu>
Cc: karchan@eddy.il.fontys.nl
Mail-Followup-To: Linux Scsi Mailing List <linux-scsi@vger.rutgers.edu>,
karchan@eddy.il.fontys.nl
In-Reply-To: <Pine.LNX.3.96.981009113741.16141C-100000@eddy.il.fontys.nl>; from karchan@eddy.il.fontys.nl on Fri, Oct 09, 1998 at 11:40:49AM +0200
On Fri, Oct 09, 1998 at 11:40:49AM +0200, karchan@eddy.il.fontys.nl wrote:
> Howdie,
>
> I get an IO-Error and a MEDIUM Error on two scsi-2 harddisks. These
> harddisks aren't essential and I don't put sensitive information on it, so
> I wish to relocate these thingies. There's supposed to be this active bad
> sector list on every scsi disk.
It probably is. The best option I know is to get sformat-3.3 (or newer)
from a SunSITE mirror, it has -verify and -repair options which can
reassign defective sectors without losing your data (it will try to
recover the data from defective blocks by extensivele re-reading the
sector and copying it over to the newly assigned block if it succeeds)
> How to do that under Linux? Is there a command to rescan the disk? Do/Will
> I lose data when relocating bad sectors?
>
> Perhaps a low-level format will help, but how do I do that? And is it
> dangerous?
A low-level-format (WITHOUT! clearing the grown defect list) will help
provided that the drive has enough defect spare locations available.
YOU WILL LOSE ALL DATA ON THE DRIVE WHEN LOW LEVEL FORMATTING IT!
--
Matthias Andree
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