RE: iSCSI: Why is ACA optional?

[Charles Monia <cmonia@NishanSystems.com>]

Hi Doug:

> -----Original Message-----
> From: Douglas Otis [mailto:dotis@sanlight.net]
> Sent: Thursday, November 30, 2000 2:01 PM
> To: Charles Monia; julian_satran@il.ibm.com; ips@ece.cmu.edu
> Subject: RE: iSCSI: Why is ACA optional?
> 
> 
> Charles,
> 
> For tape applications, not providing Sense Information within 
> the iSCSI
> response should remove much of the troubles caused by an ACA 
> mandate.  In
> otherwords, not seeing Sense within the Auto-Sense PDU should 
> not be seen as
> an error and thus all is well.
> 

If anything, providing autosense information with the CHECK CONDITION status
mitigates (but does not eliminate) the need for ACA.  With regard to tapes,
ACA is probably going to be essential when such devices get around to
supporting command queuing.

Charles