Comments to MMC-4 Revision 2c

Kenji Tokumitsu kenji-tokumitsu at hlds.co.jp
Mon Sep 1 06:02:26 PDT 2003


* From the T10 Reflector (t10 at t10.org), posted by:
* "Kenji Tokumitsu" <kenji-tokumitsu at hlds.co.jp>
*
Hello Bill,

I am Kenji Tokumitsu of Hitachi-LG Data Storage (HLDS).
The followings are my comments to MMC4R02C document.
Could you please check my comments ?

1. Page 151-152
  5.2.5 Feature Codes
  Table 70
  (1) "Feature Code 0037h CD-RW Media Write Support Feature" is not appeared
      in Table 70.
  (2) "Feature Code 01FFh Firmware Date" in Table 70 shall be
      "Feature Code 010Ch Firmware Information".
      Refer to "Page 209 5.3.41 Feature 010Ch: Firmware Information".

2. Page 181
  5.3.20 DVD+RW Feature (002Ah)
  The Ability to Write Currently Mounted Medium field is added.
  I think that this field should not be defined in the Feature descriptor.
  In my understanding, a Feature indicates the capability of the Logical
Unit.

3. Page 183
  5.3.21 DVD+R Feature (002Bh)
  The Write Capabilities for Currently Mounted Medium field is added.
  I think that this field should not be defined in the Feature descriptor.
  In my understanding, a Feature indicates the capability of the Logical
Unit.

4. Page 278
  6.8.2.1 Perfomance (Type field = 00h)
  The definition of 01b of Tolerance field is different from the definition
  in Mt.Fuji document.
  I don't know the reason why the definition is different between Mt.Fuji
and
  MMC. Is there any intentional reason ?

5. Page 345
  Table 374 - Format Code Definitions
  "Fomat Code 31-BFh Reserved" shall be "Format Code 32-BFh Reserved"

6. Page 349
  Table 383
  The last byte number in Table 383 is 2047.

7. Page 551-565: Annex F  Error Reporting
  (1) Table F.3, Table F.5, Table F.7 and Table F.10
   The Sense Key for the following ASC/ASCQs are not proper.
   ASC/ASCQ = 30/02, 30/04, 30/05, 30/06, 30/11
   I think that the proper Sense Key is 5h.

  (2) Table F.10
   The Sense Key for the following ASC/ASCQs are not proper.
   ASC/ASCQ = 27/00, 27/01, 27/02, 27/03, 27/04, 27/05
   The proper Sense Key is 7h. (Refer to Table F.7)

  (3) Table F.7 and Table F.10
   The Sense key for ASC/ASCQ = 73/06 is not proper.
   I think that it should be 1h (Recoevered Error).

  (4) Table F.3, Table F.5, Table F.7 and Table F.10
    The Sense Key for the ASC/ASCQ = 30/00 looks improper.
    In page 301 and 334, the Sense Key of "INCOMPATIBLE MEDIUM INSTALLED"
    is 5h (ILLEGAL REQUEST)

8. The definition of SK/ASC/ASCQ = MEDIUM ERROR/UNKNOWN FORMAT is not clear.
   "SK/ASC/ASCQ = MEDIUM ERROR/UNKNOWN FORMAT" is described in the following
   pages.
   (1) Page 415  6.32.2 Command Execution
   (2) Pgae 430  6.35.2 Command Execution
   (3) Page 456  6.41.2 Command Execution
   (4) Page 477  6.50.2 Command Execution
   (5) Page 482  6.51.2 Command Execution
   (6) Page 484  6.52.2 Command Execution

   I think that SK/ASC/ASCQ is "ILLEGAL REQUSET/CANNOT WRITE MEDIUM -
UNKNOWN
   FORMAT" or "ILLEGAL REQUSET/CANNOT WRITE MEDIUM - IMCOMPATIBLE FORMAT".

Best Regards,

Kenji Tokumitsu
Hitachi-LG Data Storage, Inc.
Tokyo, Japan


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