scsi interface specification - Plasmon

DRIVE COMMAND SETREAD DIAGNOSTIC PHYSICAL (E9H)READ DIAGNOSTIC PHYSICAL (E9H)The READ DIAGNOSTIC PHYSICAL Command is similar to READ (28H), except a Physical BlockAddress is specified in the command instead of a logical block.READ DIAGNOSTIC PHYSICAL Command (E9H)BITBYTE7 6 5 4 3 2 1 000 READ DIAGNOSTIC PHYSICAL (E9H)01 LUN 0 Reserved02 Physical Address (MSB)03 Physical Address04 Physical Address05 Physical Address (LSB)06 Reserved07 Transfer Length (MSB)08 Transfer Length (LSB)09 ReservedPhysical Block AddressThe Physical Block Address is 4-byte ‘signed' hexadecimal number which specifies the PHYSICALBLOCK (contrasted with LOGICAL BLOCK).A valid Physical Address is in the range of 0 to the Maximum Physical Address of a media (MAXPHYS).Use the READ SECTOR LOCATION with Maximum Logical Block Address (MAXLBA) to determineMAXPHYS.Transfer LengthThe Transfer Length is the number of 2048-byte Physical Blocks that the Initiator wants to transfer.The READ PHYSICAL Command will return 2048 bytes per sector in the same format as the READDIAGNOSTIC LONG command.Data will be transferred unless the sector cannot be accessed. If the sector is blank or not correctable, thedata will be followed by a check condition and the appropriate sense key is set. A Transfer Length of zeroindicates that no data be transferred.97653978 HPage 91