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Date:      Fri, 3 Jul 1998 15:25:13 -0700 (PDT)
From:      Julian Elischer <julian@whistle.com>
To:        Leo Papandreou <leo@talcom.net>
Cc:        questions@FreeBSD.ORG
Subject:   Re: SCSI bad blocks
Message-ID:  <Pine.BSF.3.95.980703152203.6401A-100000@current1.whistle.com>
In-Reply-To: <19980703165055.30779@supersex.com>

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On Fri, 3 Jul 1998, Leo Papandreou wrote:

> On Fri, Jul 03, 1998 at 06:20:35PM +0200, Peter van Heusden wrote:
> > received on freebsd-hackers, this problem means really bad news - your
> > drive is out of blocks to remap the bad ones to, and is basically busy
> > dying.
> 
> 
> Is the spontaneous creation of bad blocks just something that's going
> to happen to all drives? If so, does this mean that allowing a drive
> to become 100% full is never good policy?

no, the spare blocks are not available to the user to put data on
they are held in reserve by the drive itself.

they usually reserve "more than are likely needed"
so if that runs out it means your disk is developing bad sectors at an
alarming rate. i.e. it's dying.

> 
> I've taken a disk out of commision recently because it was unable to
> remap its bad blocks. I'm wondering if its worth trying to remap them
> after deleting a couple of directories. The disk is destined for the
> trash but if I can remap the bad blocks, well it sure would beat re-
> storing over a networked tape drive.

you could try a low-level reformat..
but it's probably going to run out of replacement sectors again pretty
quick.


> 
> 
> > 
> > The answer appears to 'replace the drives'.
> > 
> > Peter


yep

julian
> 


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