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SCSI Commands

Quantum DLT 4000 Tape Drive 5-59

LOG SENSE Command (4Dh) (continued)

Bit

Byte

7 6 5 4 3 2 1 0

0 - 1 Parameter Code

2 DU DS TSD ETC TMC Rsvd LP

3 Parameter Length (04h)

4 - 7

(MSB)

Parameter Value

(LSB)

Figure 5–27 Log Parameters Format for Device Status LOG SENSE Page (Parameters

0000h, 0001h, or 0002h)

Table 5–30 Log Parameters for Device Status LOG SENSE Page Field Descriptions

Field Name Description

Parameter Code Parameter Codes 0000h through 0002h are supported.

Code - Description

0000h - Specifies device type. For sequential-type devices such as tape drives,

the value is always 00010000h.

0001h - Specifies device cleaning-related status. See Figure 5-28.

0002h - Specifies the number of “loads” over the lifetime of the tape drive.

DU Disable Update. Always 0.

DS Disable Save. Not supported. This bit always set to 1.

TSD Target Save Disable. When = 0, indicates that the target provides a target-

defined method for saving log parameters. When = 1, indicates that either the

target does not provide a defined method for saving log parameters or that the

target-defined method has been disabled by the initiator.

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Quantum DLT 4000 Manual Pagina 159