Quantum DLT 8000 Manual descarregar pdf (Página 249)

100

101

SCSI Commands

Quantum DLT 8000 Tape System 5-105

5.10 MODE SENSE (6) / (10) Command (1Ah / 5Ah)

The MODE SENSE command allows the drive to report its media type, and current, or

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

MODE SELECT.

The command descriptor block for the 6-byte MODE SENSE (1Ah) is shown below. An

illustration of the command descriptor block for the 10-byte MODE SENSE (5Ah)

follows on the next page.

Bit

Byte

7 6 5 4 3 2 1 0

0 Operation Code (1Ah)

1 Logical Unit Number Rsv’d DBD Reserved

2 PC Page Code

3 Reserved

4 Allocation Length

5 Unused Reserved Flag Link

Figure 5–51 MODE SENSE (6) Command Descriptor Block — Data Format

The 10-byte MODE SENSE command is required to request the Vendor-Unique EEPROM

parameter page due to the large amount of data that parameter page contains. MODE

SENSE (10) can be used to retrieve the other pages as well. Note that MODE SENSE

(10) returns descriptor data in a different format than MODE SENSE (6).

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