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Date:      Mon, 10 Mar 1997 09:55:57 +0100
From:      j@uriah.heep.sax.de (J Wunsch)
To:        gilbertd@cs.man.ac.uk (Dave Gilbert)
Cc:        scsi@freebsd.org
Subject:   Re: Medium error messages - how to read
Message-ID:  <19970310095557.GH50073@uriah.heep.sax.de>
In-Reply-To: <3322D5EA.9398D0B@cs.man.ac.uk>; from Dave Gilbert on Mar 9, 1997 15:23:22 %2B0000
References:  <3322D5EA.9398D0B@cs.man.ac.uk>

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As Dave Gilbert wrote:

> Mar  8 21:57:40 uriah /kernel: sd1(ahc0:2:0): MEDIUM ERROR info:756cb
                                                                  ^^^^^
                               That's the failing block number (in hex).
> asc:11,0 U
> nrecovered read error

> Now I'm presuming that the 2940UW driver is not lying and it really
> is a Medium error.

The driver can hardly lye about this.

> First of all what should I do - is there anyway I can see if the drive
> has automatic block remapping on?

Yes, it's on mode page 1.  Run

	scsi -f /dev/rsd1.ctl -m 1 -e

...and set AWRE and AWWE to 1.  Anyway, since it's an unrecovered
error, you still need to write the block once in order to force a
remap.

> I'm inclined to think its the drive; but the fact that its only
> happened after its been put on the PC makes me suspicious - even
> though it is the 3rd one of these drives that we've had!

I think the Sun handled remapping of its own.
-- 
cheers, J"org

joerg_wunsch@uriah.heep.sax.de -- http://www.sax.de/~joerg/ -- NIC: JW11-RIPE
Never trust an operating system you don't have sources for. ;-)



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