Date: Tue, 14 Jan 2003 13:35:30 -0700 From: "Justin T. Gibbs" <gibbs@scsiguy.com> To: Nate Lawson <nate@root.org>, Joerg Wunsch <joerg_wunsch@uriah.heep.sax.de> Cc: freebsd-scsi@freebsd.org Subject: Re: quirk candidate: SEAGATE ST52160N Message-ID: <615050000.1042576530@aslan.btc.adaptec.com> In-Reply-To: <Pine.BSF.4.21.0301141212540.39326-100000@root.org> References: <Pine.BSF.4.21.0301141212540.39326-100000@root.org>
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> On Tue, 14 Jan 2003, Justin T. Gibbs wrote:
>> What you should probably do is trace the sense buffer both before
>> and after the sense is retrieved. Perhaps fill the target sense
>> buffer with a known pattern, log the transfer residual, and see if
>> the number of bytes overwritten is as you would expect.
>
> i.e.
> memset(csio.sense_data.sense_buf, 0xa5, sizeof csio.sense_data);
> before sending the sync cache in camcontrol, then
> printf("resid %d, sense_resid %d\n", csio.resid, csio.sense_resid);
> afterwards.
For the aic7xxx driver at least, I would suggest doing this in the driver
since the csio's sense buffer is not the direct target of the DMA.
--
Justin
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