SCSI mode pages

SCSI target devices provide a number of SCSI mode pages. These can be interrogated by a Mode Sense command and set by a Mode Select command. The Mode Sense and Mode Select commands include a 6-bit address field, allowing for 64 possible mode pages. There is a standard map of those page codes below. Note that any given SCSI device type will only support a subset of these page codes.

*00h - vendor specific
*01h - read-write error recovery parameters
*02h - disconnect-reconnect - allows the initiator to tune SCSI bus performance
*03h - format parameters (direct-access devices)
*03h - measurement units (scanner devices)
*04h - rigid disk geometry parameters
*05h - flexible disk parameters
*06h - optical memory parameters
*07h - verify error recovery parameters
*08h - caching
*09h - peripheral device - transfers vendor-specific data between an initiator and a peripheral interface below the target
*0Ah - control mode - tagged queuing, extended contingent allegiance, asynchronous event notification, and error logging
*0Bh - medium types supported
*0Ch - notch and partition parameters
*0Dh - CDROM parameters
*0Eh - CDROM audio control (playback) parameters
*0Fh - reserved for other device types ?
*10h - device configuration
*11h - medium partitions (1)
*12h - medium partitions (2)
*13h - medium partitions (3)
*14h - medium partitions (4)
*15h-1Ch - reserved for other device types ?
*1Dh - medium-changer element address assignment
*1Eh - medium-changer transport geometry parameters
*1Fh - medium-changer device capabilities
*20h-29h - vendor specific
*2Ah - CD-ROM capabilities page
*2Bh-3Eh - vendor specific
*3Fh - return all mode pages (valid only for a Mode Sense command)