Emerson MVME147 manual Read Block Limits Packet

Read Block Limits Packet 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		0		0	0		0
+$0C		0		0	0		0
+$0E		0		0	0		0
+$10		0		0	0		0
+$12		0		0	0		0
+$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)

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