SBP 1394 hard drives hang with Windows XP (rare)

Peter Johansson PJohansson at
Mon May 12 16:37:47 PDT 2003

* From the T10 Reflector (t10 at, posted by:
* Peter Johansson <PJohansson at>
At 10:14 AM 5/12/2003 -0600, Pat LaVarre wrote:

>Are we just saying it's easy to find a bridge that copies only one byte of 
>TransferLength to IDE from ORB, rather than two, no matter the op?

No, that's not what I'm trying to say, Pat---but I do appreciate your 
clarification on ATA.

I was trying to say that the fault appears more likely to be in the bridge 
chip firmware than in host OS software. Except to the firmware engineer 
assigned to fix the problem, it's not a critical distinction whether the 
bridge chip firmware is a) failing to split one RBC command into multiple 
ATA commands, b) failing to copy a 16-bit transfer length properly or c) 
failing for some other error in code implementation.

This whole reflector thread suggests the need for better qualification 
tests ...


Peter Johansson

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

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

PJohansson at

* For T10 Reflector information, send a message with
* 'info t10' (no quotes) in the message body to majordomo at

More information about the T10 mailing list