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Read Block Limits Packet
7-45
7
Read Block Limits Packet
The read block limits command ($05) returns the maximum and minimum
block size written on the tape. The controllers supported by the SCSI firmware
only support QIC 24 or QIC 11 type blocks which equal 512 ($200) bytes.
The table below shows the read block limits packet.
Even Byte \
Odd Byte \
FC B8 74 30
+$00 Controller LUN Device LUN
+$02 Status Byte 0 Status Byte 1 (Note 1)
+$04 Returned Maximum Block Length (MSW)
+$06 Returned Maximum Block Length (LSW)
+$08 Returned Minimum Block Length
+$0A 0000
+$0C 0000
+$0E 0000
+$10 0000
+$12 0000
+$14 0 0 Function Code (34)
+$16 Interrupt Level Vector Number
+$18 Status Byte 2 Status Byte 3 (Note 1)
$00 00000xxx Controller logical unit
number
$01 00000xxx Device logical unit
number
$02 xxxxxxxx Status from SCSI
firmware (byte 0)
(Note 1)
$03 xxxxxxxx Status from SCSI
firmware (byte 1)
(Note 1)