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Date:      Sat, 26 Feb 2000 22:30:01 -0700
From:      Warner Losh <imp@village.org>
To:        "Kenneth D. Merry" <ken@kdm.org>
Cc:        Rahul Dhesi <dhesi@rahul.net>, freebsd-stable@FreeBSD.ORG
Subject:   Re: disk repair on SunOS 
Message-ID:  <200002270530.WAA64001@harmony.village.org>
In-Reply-To: Your message of "Sat, 26 Feb 2000 21:01:21 MST." <20000226210121.A28630@panzer.kdm.org> 
References:  <20000226210121.A28630@panzer.kdm.org>  <20000226235005.6973B3FF09@bolero.rahul.net> 

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In message <20000226210121.A28630@panzer.kdm.org> "Kenneth D. Merry" writes:
: First, make sure that read and write reallocation are turned on in mode
: page 1.  Then you can issue a write(6) or write(10) command using
: 'camcontrol cmd' with null data.  The drive will remap the block for you.

How is this different than 'dd of=/dev/rdaX if=/dev/zero oseek=XXX'?
I've turned on read/write reallocation in page 1 in a drive I have
here.  I did a dd for the entire drive, and I still have sectors I
can't read.  After doing the remapping via the adaptech 19160
controller for a few sectors, they read fine.  It looks like there are
about 100 of bad sectors clustered 3 at a time every cylendar or so.
It appears that the defect list of the drive was lost....

: To find out the format of SCSI write commands, see the SCSI drafts at
: www.t10.org.

I was afraid that you'd say that. :-)

I suppose this is the same thing that the test media function of a
adaptech controller bios, no?

Warner




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