MMC 5r02c: Typo in 5.3.5 Write Protect Feature (0004h) and clarification request

David Burg daviburg at windows.microsoft.com
Thu Feb 23 18:37:14 PST 2006


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Hello,
There is a small typo in 5.3.5 Write Protect Feature (0004h):
"The WDCB bit indicates that the Drive supports writing the Write
Inhibit DCB on DVD+RW media. If WCDBWDCB is
set to one, the READ/SEND DISC STRUCTURE command with format code = 30h
shall be supported."
Also, it is not clear which table in correct between:
Table 97 - Write Protect Feature Commands
Op Code Command Description Reference
READ DISC STRUCTURE when Media type=0
Format code C0h when WDCB = 0
Format codes 30h and C0h when WDCB = 1
ADh 6.23
READ DISC STRUCTURE when Media type=1
Format codes 30h, C0h when DWP = 1
6.23
SEND DISC STRUCTURE when Media type=0
Format code C0h when SPWP = 1
Format code 30h when WDCB = 1
BFh 6.33
SEND DISC STRUCTURE when Media type=1
Format codes 30h when DWP = 1
6.33
And:
Table 381 - Features Associated with the READ DISC STRUCTURE Command
Feature Number Feature Name Command Requirement
0004h Write Protect Format codes C0h Mandatory
Is format code C0h always mandatory when Write Protect Feature is
present, or only when Write Protect Feature's bit WDCB is 1?
(I apologize for the poor rendering of the table copy. Please refer to
the MMC draft for an easier read.)
Best regards,
David Burg
Research Software Engineering Lead
Tel.: +1 425 707 8769



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