RE: iSCSI Autosense

["Douglas Otis" <dotis@sanlight.net>]

> -----Original Message-----
> From: owner-ips@ece.cmu.edu [mailto:owner-ips@ece.cmu.edu]On Behalf Of
> Peter Johansson
> Sent: Tuesday, August 29, 2000 5:56 PM
> To: IP Storage
> Subject: RE: iSCSI Autosense
>
>
> At 11:44 AM 8/29/00, Douglas Otis wrote:
>
> >It would be nice to assume all devices and initiators support ACA and
> >Autosense but a network transport does not by necessity exclude devices
> >that do not.
>
> Doug, would you clarify for me please?
>
> Do you mean to say:
>
> a) A network transport MUST not exclude certain devices;
> b) A network transport SHOULD not exclude certain devices; or
> c) Something else.

SAM provides a means of enabling Autosense that can be refused.  iSCSI
instead defaults with Autosense.  Autosense is problematic on devices that
only support CA.  It would be nice if everything looked the same, but is it
safe to require a kludge emulating ACA in this case when simply disabling
Autosense provides a cleaner solution?  Yes, I know FC requires Autosense,
but is iSCSI limited to just newer devices?

Doug

> I think it is perfectly reasonable for iSCSI to profile the SAM features
> required of devices that wish to use iSCSI---and eminently reasonable to
> require such devices to support autosense!
>
> Regards,
>
> Peter Johansson
>
> Congruent Software, Inc.
> 98 Colorado Avenue
> Berkeley, CA  94707
>
> (510) 527-3926
> (510) 527-3856 FAX
>
> PJohansson@ACM.org
>