RE: iSCSI Autosense

[Black_David@emc.com]

> If adapters on a device basis provide access, can one assume such
equipment
> will support ACA?  If not, is it practical for the adapter to recognize
this
> limitation and make required translations?  This could be problematic in
> less aggressive technologies such as tape, loaders, and the like.

I believe ACA should have been Autosense in the first question above.

A target adapter (i.e., iSCSI target to SCSI initiator) can definitely make
the translation - in response to a CHECK CONDITION from a device that
does not support Autosense, it fetches the sense data, clears the condition,
and returns the data as specified by Autosense.  The requirements
document already contains a statement that older SCSI devices
may require translations of this ilk.  This is much better than
expecting the iSCSI initiator to come in and clean things up,
since the device can't do anything else until this is done, and the
iSCSI initiator may be some distance away.

--David

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David L. Black, Senior Technologist
EMC Corporation, 42 South St., Hopkinton, MA  01748
+1 (508) 435-1000 x75140, FAX: +1 (508) 497-6909
black_david@emc.com  Cellular: +1 (978) 394-7754
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