scsi interface specification - Plasmon

DRIVE COMMAND SET WRITE BUFFER (3BH)WRITE BUFFER (3BH)(10 BYTE WITH FIRMWARE DOWNLOAD OPTION)The WRITE BUFFER command is used for diagnostics or for downloading microcode to the LaserDrive,depending on the value of the Mode field in byte 1.WRITE BUFFER - DIAGNOSTICSWhen implemented as a diagnostic tool, the WRITE BUFFER command requests a transfer of data fromthe Initiator to the read/write buffer and is used in conjunction with the READ BUFFER command.WRITE BUFFER Command (3BH) - DiagnosticsBITBYTE7 6 5 4 3 2 1 0Mode00 WRITE BUFFER (3BH)01 LUN 0 Reserved Mode02 Reserved03 Reserved04 Reserved05 Reserved06 Reserved07 Allocation Length (MSB)08 Allocation Length (LSB)09 ReservedThe Mode field must be a 2 (data only).Allocation LengthThe Allocation Length field represents the number of sector blocks to be transferred to the buffer. Thisvalue must be within the range of 0H to 3EFH. Any other Allocation Length value will result in a CHECKCONDITION status with a sense key of ILLEGAL REQUEST.NOTEDue to hardware limitations, the LaserDrive will transfer sector blocksrather than bytes in response to the Allocation Length of thiscommand. This is not SCSI-2 compliant.PLASMON L M S - LD 6100/LF 6600/LF 6602 SCSI INTERFACE SPECIFICATIONPage 122