REPORT LU DESCRIPTORS parameter data format problem
roweber at IEEE.org
Mon Jun 1 10:30:45 PDT 2009
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I believe that July CAP agenda item 5.1.7, which is 09-200r0,
intends to resolve this issue.
Please let me know if there are any errors in the proposal.
All the best,
Penokie, George wrote:
> In the 188.8.131.52 REPORT LU DESCRIPTORS service action the last few
> paragraphs in 184.108.40.206.2 REPORT LU DESCRIPTORS parameter data format
> (SPC-4) states:
> The Logical Unit descriptor shall include the DEVICE TYPE SPECIFIC
> DATA field if:
> a) the PERIPHERAL DEVICE TYPE field contains 0h, 4h, or 7h;
> b) the logical unit supports the READ CAPACITY command (see SBC-2)
> A) the RELADR bit set to zero; and
> B) the PMI bit set to zero;
> c) the logical unit standard INQUIRY data (see 6.4.2) has the RMB
> bit set to zero.
> If the Logical Unit descriptor includes the DEVICE TYPE SPECIFIC DATA
> field, then the size of the DEVICE TYPE SPECIFIC DATA field shall be
> 12 bytes and the field shall contain data equivalent to that returned
> by a successful READ CAPACITY command with LONGLBA bit set to one, and
> the RELADR and PMI bits set to zero.
> There is more than one problem with this. Some of them are:
> -there is no longer a RELADR bit.
> -the Read Capacity command is now Read Capacity (10) and Read Capacity
> (16) so which one is being talked about
> -it's not at all clear as to what is in the 12 bytes or what that has
> to do with Read Capacity
> -what is data equivalent to that returned by a successful READ
> CAPACITY command
> I would do a proposal to fix this but I have no idea what to change it
> to. Does anyone know what is supposed to be going on here?
> Bye for now,
> George Penokie
> LSI Corporation
> 3033 41st St. NW
> Suite 100
> Rochester, MN 55901
> george.penokie at lsi.com
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