ACA Recovery Methods Supported by a Logical Unit(X3T10/94-177R0)

Charles Monia, SHR3-2/W3, 237-6757 08-Sep-1994 1442 monia at starch.enet.dec.com
Thu Sep 8 11:40:22 PDT 1994


Quoting from Gene Milligan's response:

>Charles Monia wrote:
>>ACA-2 = 0, SCSI-2 rules implemented.
>>ACA-2 = 1, SCSI-2 rules unimplemented.
> 
>>ACA-3 = 0, SCSI-3 rules unimplemented.
>>ACA-3 = 1, SCSI-3 rules implemented.
 
>How would the bits be set by a device that implements SCSI-2 rules if in
>SCSI-2 mode and SCSI-3 rules if in SCSI-3 mode? I presume 01. But the response
>needs to be conditioned by the initiator with knowledge of which mode is set.
 
I had (naively) assumed that a device in SCSI-2 mode would respond with a
00. ie. It would behave as though it knew nothing about SCSI-3. Is that behavior 
correct for devices that support more than one mode?

Charles





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