[T10] SBP 1394 hard drives hang with Windows XP (rare)
PJohansson at acm.org
Fri May 2 16:29:35 PDT 2003
* From the T10 Reflector (t10 at t10.org), posted by:
* Peter Johansson <PJohansson at ACM.org>
At 09:58 AM 5/2/2003 -0600, Pat LaVarre wrote:
>I have heard rumours of a coordinated Apple/ Microsoft effort to let a
>1394 device declare that it works best with a four-byte-aligned physical
>address, but I don't know anything more specific than that.
No proposal remotely similar to this rumor was brought forward by either
Apple or Microsoft during the development of SBP-3. If there was credible
interest in this idea, the SBP-3 working group would have been the place to
It's not a particularly good idea. What does "works best" translate to?
Doesn't work at all with other alignments? This simply adds complexity to
initiator implementations for little practical value. Because an SBP-3
target uses Serial Bus block read and block write requests to transfer data
and because these requests, by definition, accept arbitrary byte alignments
and lengths, it is not an undue requirement to expect SBP-3 targets to
operate correctly with arbitrarily aligned buffers.
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PJohansson at ACM.org
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