[4423] in linux-scsi channel archive
Re: Bad blocks: How many?
daemon@ATHENA.MIT.EDU (Michael Horton)
Tue Jul 21 10:01:59 1998
Date: Tue, 21 Jul 1998 08:09:10 -0500
To: "Tim Robinson" <timr@sykes.demon.co.uk>, linux-scsi@vger.rutgers.edu
From: Michael Horton <handh@netten.net>
In-Reply-To: <01bdb48c$96b04f00$0102a8c0@gateway.melksham>
Tim,
The issue to be concerned with is the "grown table" statistic.
All hard drives have defects from the manufacturing process. The factory
blocks these out and they are not used. The manufacturer expects a certain
number of defects and allows for this by making the hard drives larger (sic).
The grown defects are defects that occur after the hard drive leaves the
factory. These are important and you have some control over these. Proper
handling of hard drives will minimize grown defects; poor handling can
create them.
Once "grown defects" start showing up, the hard drive should be monitored
closely as it may be an indication of future/impending failure.
The problems you are experiencing are, in all probability, not caused by
the factory blocked defects.
HTH,
MH
At 10:47 AM 7/21/98 +0100, you wrote:
>
>Hi
>
>I lately discovered scsiinfo from this list, which I ran on
>my IBM DCAS 34330 (4.33GB) drive.
>
>scsiinfo claims 647 defects in the manufacturers list, then throws out a
>list,
>finally reporting '0 entries in grown table'
>
>Is 647 a reasonable defect count? I have no feel for what to expect here.
>This disk has been giving occasional problems, causing scsi timeouts and
>preventing some users from saving large files. Is this related?
>
>Thanks for any info
>
>TimR
>
>
>
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