SCSI Read Capacity Command


SCSI Read Capacity Command

The SCSI Read Capacity command is used to obtain data capacity information from a target device.

The command descriptor block (CDB) structure is:

The special control fields in the CDB have the following meaning:

*RelAdr - indicates that the logical block address (LBA) value is relative (only used with linked commands).
*PMI - partial medium indicator:
**0 - return value for the last LBA
**1 - return value for the last LBA after which a substantial delay in data transfer will be encountered (e.g., the current track or cylinder)

The target will return capacity data structured as follows:


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