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Date:      Tue, 14 Jan 2003 14:35:05 +0100
From:      Joerg Wunsch <j@uriah.heep.sax.de>
To:        "Justin T. Gibbs" <gibbs@scsiguy.com>
Cc:        freebsd-scsi@freebsd.org
Subject:   Re: quirk candidate: SEAGATE ST52160N
Message-ID:  <20030114143505.A12331@uriah.heep.sax.de>
In-Reply-To: <774150000.1042549034@aslan.scsiguy.com>; from gibbs@scsiguy.com on Tue, Jan 14, 2003 at 05:57:14AM -0700
References:  <20030113220055.D50550@uriah.heep.sax.de> <147830000.1042501904@aslan.btc.adaptec.com> <20030114074853.A71485@uriah.heep.sax.de> <774150000.1042549034@aslan.scsiguy.com>

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As Justin T. Gibbs wrote:

> >> It would be interesting to know the full content of the sense data.
> > 
> > uncle# camcontrol cmd da1 -v -c '35 0 0 0 0 0 0 0 0 0'
> > camcontrol: error sending command
> > (pass1:ahc0:0:3:0): SYNCHRONIZE CACHE. CDB: 35 0 0 0 0 0 0 0 0 0 
> > (pass1:ahc0:0:3:0): CAM Status: SCSI Status Error
> > (pass1:ahc0:0:3:0): SCSI Status: Check Condition
> > (pass1:ahc0:0:3:0): ILLEGAL REQUEST asc:20,0
> > (pass1:ahc0:0:3:0): Invalid command operation code: Command byte 0  is
> > invalid
> 
> So your disk doesn't always butcher byte zero of the sense data?

Isn't byte 0 the `35' for the command?  I. e., it is complaining
that it doesn't understand the SYNCHRONIZE CACHE cmd at all.

> This looks like a perfectly valid response.

The response might be valid, but the request isn't (for that
device). ;-)

Not that i'd care much about this drive (it's experimental only,
and i know they are crap), but message like this one IMHO confuse
the users.  SYNCHRONIZE CACHE is marked optional in the standard,
i thought we'd automatically detect the non-support of this
command by a target, and silently ignore it?
-- 
cheers, J"org               .-.-.   --... ...--   -.. .  DL8DTL

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

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