User's Guide

Chapter 3 Emulated DLT7000 SCSI Commands

Mode Sense (6/10) (1Ah / 5Ah)

206 Quantum DX-Series Software Interface Guide

MODE SENSE

Block Descriptor

The following figure describes the MODE SENSE block descriptor that

follows the MODE SENSE header. Descriptions of the MODE SENSE

blocks are provided in Table 5-51.

Table 158 MODE

SENSE Block

Descriptor - Data

Format

Buffered

Mode

This mode implements Immediate Reporting on

WRITE commands via the Buffered Mode.

If the field is 0, then the drive does not report a

GOOD status on WRITE commands until the data

blocks are actually written to tape.

If the field is 1, then the drive reports GOOD status

on WRITE commands as soon as the data block has

been transferred to the buffer. This is the default

configuration of the drive. Note that if Buffered

Mode is not used, the tape drive will suffer a

degradation in performance, but not in capacity.

Speed The tape drive supports only one speed. This is the

default speed (0).

Block

Descriptor

Length

This field specifies the length (in bytes) of all of the

block descriptors. Since the drive only supports one

block descriptor, this value is 08h.

Bit/Byte 7 6 5 4 3 2 1 0

Density Code

Field Name Description