Reminder: Please send your opinions CORE Feature Hybrid disc

keiji_katata at post.pioneer.co.jp keiji_katata at post.pioneer.co.jp
Thu Jan 5 22:15:20 PST 2006


* From the T10 Reflector (t10 at t10.org), posted by:
* keiji_katata at post.pioneer.co.jp
*

Hello all,

Please send your opinion by Jan. 8 if you may not attend the next MMC5 WG.

Q1. CORE feature v2,
 Which do you favor Mandatory vs. Optional?
 ---- Microsoft opnion ----
 Update CORE feature version to 2.
 Add a bit to indicate the following:
 -INQUIRY data Allocation Length is two bytes in length.
 -INQUIRY data format length update.
 -LLBAA and Subpage bits are checked for valid setting by logical unit.
 -Mode field of READ BUFFER command is checked to five bits length by logical
unit.
 -LBA field of READ CAPACITY is checked by logical unit.
 -Mode field of WRITE BUFFER command is checked to five bits length by logical
unit.
 --------

Q2. Hybrid command,
 Do you accept the change of reporting error?
 If you accept, which do you favor Reporting error vs. No reporting error.

Best regards,

Keiji Katata
PIONEER CORP.

---- Original Message at 2005/12/28 ----
Hi all,


1. CORE feature V2

Ai san, you may have different an opinion with Editor and Henry-san.

Editorial comment:
Thank you Ai san, Kohda san will take care those comments.

Inquiry command:
All host software uses this command to identify the device type. So regardless
of MMC device or not, this should work. Also Mode Select, Mode Sense, all host
software uses this command, so it is desirable that a system uses a module to
issue this command.

Read Capacity command:
Already MMC3 (not MMC5) had this field and there was no statement. So Kohda san
made a statement to help the host software implementation. This will reduce
confusion of document readers.

Above four command sets, we may care the document readers, so Kohda san made
sentences. In case of other commands, they are not same situation as the above
commands.

Format unit command:
I think this is very different situation. Because since the SBC (1997), SBC and
Fuji were different each other. So MMC has its own description now.

Read command, Write command:
I think SBC device and MMC device have different requirements of market. So they
must have own description.

Ai san, could you consider this historical situation. Then could you reconsider
your requests.


2. Hybrid disc command

I understand Henry-san opinion. But this has been voted and has been agreed as
Hybrid disc command set. Posting new proposal has been closed now. And sending a
wrong command to device is a problem of host software. In this case, it is very
minor mistake and this should not cause any fatal problem of the end users (e.g.
lose of data, break of media).

But I would like to correct other members opinion if you can accept to change
this issue again.
Pioneer does not mind that device reports error, vs. device stops reporting
error. Both case uses very similar FW program anyway.

3. Request for members

Please send your opinion by Jan. 8th 2006 if you may not attend MMC at Jan. 9th
2006.

Q1. CORE feature v2,
 Which do you favor Mandatory vs. Optional?

Q2. Hybrid command,
 Do you accept the change of reporting error?
 If you accept, which do you favor Reporting error vs. No reporting error.

Best regards,

Keiji Katata
PIONEER CORP.





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