SBP-2 Study Group

Peter Johansson PJohansson at
Wed Aug 9 11:31:34 PDT 2000

* From the T10 Reflector (t10 at, posted by:
* Peter Johansson <PJohansson at>
At 10:03 AM 8/8/00, Chang, Ben wrote:

>I support adding features to SBP-2 (e.g. for scanners, etc.), but makers 
>of existing SBP-2 devices (e.g. HDD) need to understand which functions 
>are optional (for them). The clarification probably belongs in RBC or 
>other disk profile, but the distinction should be clear. I just want to 
>make sure that SBP-2 changes appropriately ripple through to RBC.

Ben, SBP-2 and RBC (reduced block commands, a command set for disk drives) 
are orthogonal to each other. SBP-2 is a transport, RBC a command set.

Proposed new features in SBP-2 (for example, isochronous) are likely to be 
optional since not all classes of device which wish to use the transport 
would necessarily need these features.


Peter Johansson

Congruent Software, Inc.
98 Colorado Avenue
Berkeley, CA  94707

(510) 527-3926
(510) 527-3856 FAX

PJohansson at

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