Date: Wed, 21 Jul 1999 09:30:25 -0700 From: Mike Smith <mike@smith.net.au> To: asami@cs.berkeley.edu (Satoshi Asami) Cc: scsi@freebsd.org Subject: Re: error logs Message-ID: <199907211630.JAA00715@dingo.cdrom.com> In-Reply-To: Your message of "Wed, 21 Jul 1999 02:37:32 PDT." <199907210937.CAA96811@silvia.hip.berkeley.edu>
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> Hi,
>
> I have a question. I just saw some errors on the package building
> machine. Part of it looks like this:
>
> ===
> :
> Jul 21 02:25:39 bento /kernel: (da7:ahc1:0:4:0): READ(10). CDB: 28 0 0 3c f8 16 0 0 2 0
> Jul 21 02:25:39 bento /kernel: (da7:ahc1:0:4:0): MEDIUM ERROR info:3cf816 asc:11,0
> Jul 21 02:25:39 bento /kernel: (da7:ahc1:0:4:0): Unrecovered read error sks:80,9
This is a fatal read error. The kernel will retry it.
> Jul 21 02:25:40 bento /kernel: (da7:ahc1:0:4:0): READ(10). CDB: 28 0 0 3c f8 16 0 0 2 0
> Jul 21 02:25:41 bento /kernel: (da7:ahc1:0:4:0): RECOVERED ERROR info:3cf817 asc:17,2
> Jul 21 02:25:41 bento /kernel: (da7:ahc1:0:4:0): Recovered data with positive head offset sks:80,2
> :
This is the kernel-instigated retry, note that the read10 command is
the same. The drive reports that it was able to recover the data but
needed to adjust the head position in order to do so.
> ===
>
> I assume the stuff after "CDB:" is the entire SCSI command (10-byte
> commands?), does this mean that the kernel got a medium error from the
> disk, retried the exact same read command and succeeded the second
> time, even though the disk had to do some internal fiddling ("positive
> head offset")?
>
> I also see a bunch of recovered error messages with no associated
> medium error messages. This probably means the disk is dying, right?
It at least means that it's grown some defects. What I'm not seeing
are any additions to the grown defects list, despite ARRE being set. 8(
--
\\ The mind's the standard \\ Mike Smith
\\ of the man. \\ msmith@freebsd.org
\\ -- Joseph Merrick \\ msmith@cdrom.com
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