IBM T200F User Manual download pdf (Page 40)

MODE SELECT

Table 26. Byte MODE SELECT Command

76543210

0 Operation Code (15h)

1 Logical Unit Number (0) PF Reserved SP(0)

2 Reserved

3 Reserved

4 Parameter List Length

5 Control

Table 27. Byte MODE SELECT Command

76543210

0 Operation Code (55h)

1 Logical Unit Number (0) PF Reserved SP(0)

2 Reserved

3 Reserved

4 Reserved

5 Reserved

6 Reserved

Parameter List Length

9 Control

Both the 10-byte and 6-byte versions of the MODE SELECT command are

supported.

The MODE SELECT command causes configuration data to be sent to the drive.

For the format of Mode data and supported Mode pages see “MODE SENSE” on

page 27.

The Page Format (PF) flag may be any value. However, the drive assumes that the

format is SCSI-2. The Save Pages (SP) flag must be set to 0, since saved pages

are not supported. The Parameter List Length field should be set to the amount of

data to be sent to the drive.

The maximum acceptable Parameter List Length for a SCSI parallel drive is 198

bytes, and the maximum acceptable Parameter List Length for a Fibre Channel

drive is 222 bytes. Any command with a larger value results in a Check Condition

status. The associated sense data returns with a Sense Key of Illegal Request and

an ASC/ASCQ of Invalid Field in CDB (2400).

If any of the fields in the Mode pages are invalid, no parameters are altered, Check

Condition status is returned, the Sense Key is set to Illegal Request, and the

ASC/ASCQ is set to Invalid Field in Parameter List (2600).

26 Ultrium Internal Tape Drive and 3580 Ultrium Tape Drive: SCSI Reference

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IBM T200F User Manual Page 40