Hewlett-Packard C737990900 Manual

A SERVICE OF

next previous

Commands 123

Commands

REPORT DENSITY SUPPORT 44h

The Report Density Support command returns details about the tape formats

supported by the drive.

The data is returned as a header and a series of descriptor blocks.

Pre-Execution Checks

Command Descriptor Block

CDB Fields

Illegal Field Deferred Error Unit Attention

7 6 5 4 3 2 1 0

0

Operation Code (44h)

1

Reserved (0) Media

2

Reserved (0)

6

7

(MSB)

Allocation Length

8

(LSB)

9

Control

Media 0 One descriptor block is returned for each format supported by the drive. The capacity field

in the descriptor block will indicate the capacity of the current media.

1 One descriptor block is returned with the data for the currently loaded tape. The capacity

field will indicate the maximum for the format. If there is no tape insterted in the drive, the

drivr eill return

CHECK CONDITION with a sens key of NOT READY and additional sense of

3A 00h (medium not present).

Allocation

Length

This specifies the maximum number of bytes which the drive should return in its data-out phase.

Either the entire available data or allocation length bytes of the page are returned, whichever is

least.

0 No data transfer will occur. This is not considered an error.