scsi interface specification - Plasmon

DRIVE COMMAND SET MODE SENSE (1AH)Real Time Performance Monitor (RTPM)The Real Time Performance Monitor (RTPM) bit is set to one if the LaserDrive is in a read-only state due toa current RTPM condition. This condition will also set the WP bit.Write Protect Status (WPS)The Write Protect Status bit (WPS) is set to one if the Initiator selected Write Protect mode in a previousMode Select. This bit will be a zero if Write Protect was not selected by a previous MODE SELECTcommand. This bit can be used to determine if a drive is write protected or a media is write protected. Inthe following list, WP is the Write Protect status reported in byte 2 of the Mode Sense Data header andWPS is found in byte 3 of page 20.WP RTPM WPS Definition1 0 0 Write Protect Invoked Via the Media CartridgeSwitch0 0 0 Write Protection Disabled1 0 1 Write Protect Invoked Via the Host or DOCPanel0 X 1 Invalid State1 1 0 Write Protect due to RTPM Failure1 1 1 Write Protect due from (the Host or DocPanel) and RTPMThe default for byte 2 of Vendor Unique page 20 is zero. The default for byte 3 of Vendor Unique page 20is 04H.PLASMON L M S - LD 6100/LF 6600/LF 6602 SCSI INTERFACE SPECIFICATIONPage 80