MODE SENSE 10 (5Ah)The MODE SENSE (10) command provides a means for a device server to report parameters to anapplication client. It is a complementary command to the MODE SELECT command. For documentationon the supported Mode Pages refer to the Mode Sense (6) command.Bit 7 6 5 4 3 2 1 0Byte0 Operation Code (5Ah)1 LUN Reserved DBD Reserved2 PC Page Code3 Subpage Code4 Reserved5 Reserved6 Reserved7 (MSB) Allocation length8 (LSB)9 ControlField descriptions:DBD: The Disable Block Descriptors bit specifies if the media changer may return block descriptor afterthe Parameter List Header. The media changer does not support block descriptors, therefore thisbit is ignored.PC: The Page Control field defines the type of mode parameter values to be returned in the modepages.00b Report Current Values (equal to default values if no pages previously saved)01b Report changeable values10b Report Default Values11b Report Saved Values (equal to default values if no pages previously saved)Page Code:The page code defines which pages should be returned. A Initiator can request one or all modesense pages. Each response includes four bytes for the Parameter List Header, followed by thespecified number of bytes for each page.Mode Parameter ListThe returned data on a Model Sense (10) command begins with an eight byte Mode Parameter Headerfollowed by one or all Mode Sense pages as requested by the Page Code and Subpage Code fields.Bit 7 6 5 4 3 2 1 0Byte0 - 7 Mode Parameter Header8 - n Mode Sense Page(s)Chapter 3. Supported SCSI Commands 3-39
