RE: iSCSI Autosense

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

David,

I think you are confusing ACA (Auto Contingent Allegiance) with CA
(Contingent Allegiance).  My concern was implementing ACA on a device that
only implemented CA and then forced to implement Autosense.

Doug

> -----Original Message-----
> From: owner-ips@ece.cmu.edu [mailto:owner-ips@ece.cmu.edu]On Behalf Of
> Black_David@emc.com
> Sent: Tuesday, August 29, 2000 3:11 PM
> To: ips@ece.cmu.edu
> Subject: RE: iSCSI Autosense
>
>
> > If you were to add Autosense emulation at the remote adapter,
> then should
> it
> > be done with ACA emulation as well if tags are supported? (FCP drives
> > require Autosense.)
>
> I believe the proposal is to require Autosense for iSCSI and not support
> ACA.
> Autosense can be emulated on top of ACA in the remote adapter as outlined
> in previous mail - this has no effect on what has to be specified
> for iSCSI.
> FCP drives do not pose a problem as Autosense would be used on both
> sides of the remote adapter.
>
> > SAM provides for conditional enabling of Autosense if allowed, whereas
> iSCSI
> > provides for the conditional disabling of Autosense making Autosense a
> > required feature.  This would also seem to imply ACA would also be a
> > required feature.
>
> That is not the case - please reread Ralph Weber's email on this
> topic.  If
> FCP can forbid ACA, so can iSCSI.
>
> --David
>
> ---------------------------------------------------
> David L. Black, Senior Technologist
> EMC Corporation, 42 South St., Hopkinton, MA  01748
> +1 (508) 435-1000 x75140, FAX: +1 (508) 497-6909
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>