Michael,

IBM's position on treatment of MAM when the volume is write protected is that if a cartridge is write-protected, Write Attribute command is rejected as write protected, 7/27/00.  The sense key should be DATA PROTECT (not MEDIUM ERROR).

The proposed text ", except for WRITE ATTRIBUTE (see SPC-4)," should not be added and Table 5 should list DATA PROTECT instead of MEDIUM ERROR for "Processing a WRITE ATTRIBUTE command that would result in alteration of a write protected medium."

Thanks,

Kevin D. Butt
SCSI & Fibre Channel Architect, Tape Firmware
MS 6TYA, 9000 S. Rita Rd., Tucson, AZ 85744
Tel: 520-799-2869 / 520-799-5280
Fax: 520-799-2723 (T/L:321)
Email address: kdbutt@us.ibm.com
http://www-03.ibm.com/servers/storage/