scsi interface specification - Plasmon

DRIVE COMMAND SET READ CAPACITY (25H)READ CAPACITY (25H)The LaserDrive supports the READ CAPACITY command and provides a means for the Initiator to requestinformation regarding the capacity of the currently spinning media. Because the capacity is not known untilthe disk spins, a NOT READY condition will cause this command to be rejected with a CHECKCONDITION status, Sense Key of 02 and an ASC of 04.READ CAPACITY Command (25H)BITBYTE7 6 5 4 3 2 1 000 READ CAPACITY (25H)01 LUN 0 Reserved02 Reserved03 Reserved04 Reserved05 Reserved06 Reserved07 Reserved08 Reserved09 ReservedThe READ CAPACITY command returns the Maximum Logical Block Address and Block Length (in bytes)of the logical unit.The Block Length is always 400H (1024d). The Maximum Logical Address value returned is B1F755H(11663189d).The 8 bytes of READ CAPACITY data, shown in Table 34, are sent by the LaserDrive during the DATA INphase of the command.BYTETable 34. READ CAPACITY DataDESCRIPTION0 Maximum Logical Block Address (MSB)1 Maximum Logical Block Address2 Maximum Logical Block Address3 Maximum Logical Block Address (LSB)4 Block Length (MSB)5 Block Length6 Block Length7 Block Length (LSB)PLASMON L M S - LD 6100/LF 6600/LF 6602 SCSI INTERFACE SPECIFICATIONPage 88