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