User's Manual

DLT4000 SCSI Interface

8-72 DLT4000/DLT4500/DLT4700 Cartridge Tape Subsystem

Bit

7 6 5 4 3 2 1 0

0 Operation Code (5Ah)

1 Logical Unit Number Rsvd DBD Reserved

2 PC Page Code

Byte 3 Reserved

4 Reserved

5 Reserved

6 Reserved

7 (MSB)

8 Allocation Length (LSB)

9 Unused Reserved Flag Link

Figure 8-43 MODE SENSE CDB (10)

MODE SENSE allows the drive to report its media, current or changeable

configuration parameters to the host. It is a complementary command to MODE

SELECT.

DBD

If the Disable Block Descriptors bit is zero, the device returns the Block Descriptor

Data. If set, then the Block Descriptor information is not returned.

The Page Control field indicates the type of page parameter values to be returned to

the host as shown in the following table:

PC Description

0 0 Report Current Values

0 1 Report Changeable Values

1 0 Report Default Values

1 1 Report Save Values

Figure 8-44 MODE SENSE Page Control Definition

The Additional Page Length field of each page returned by the drive indicates the

number of bytes supported for that page.