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SDLT 600 SCSI Interface Guide Chapter 4: SCSI Commands

81-81200-02 REV A01 January 2005 4-199

4.22 REPORT DENSITY SUPPORT Command (44h)

The REPORT DENSITY SUPPORT command is a 10-byte command that the application client uses

to request information about the densities the SDLT tape drive supports. Note that a reservation

conflict occurs when the drive receives a REPORT DENSITY SUPPORT command from any initiator

other than the one holding a logical unit reservation for the drive.

The figure below illustrates the format of the REPORT DENSITY SUPPORT command; the table that

follows explains the data fields of the command.

Figure 4-107. REPORT DENSITY SUPPORT Command Descriptor Block — Data Format

The REPORT DENSITY SUPPORT command returns a header followed by one or more density

support data blocks. The data blocks are presented in ascending numerical order of the primary density

code value.

Bit

Byte

7 6 5 4 3 2 1 0

0 Operation Code (44h)

1 Reserved Media

2 – 6 Reserved

7 – 8

(MSB)

Allocation Length

(LSB)

9 Control

Table 4-116. REPORT DENSITY SUPPORT Command — Field Descriptions

Field Name Description

Media When set to 0, the drive returns density support data blocks for the densities of

any supported medium.

When set to 1, the drive returns density support data blocks for the densities

supported by the mounted medium only.

Allocation

Length

Specifies the maximum number of data bytes that the drive is allowed to return.

SDLT 600

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