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MODE SELECT (6) / (10) Command (15h / 55h) SDLT 600 SCSI Interface Guide

4-74 January 2005 81-81200-02 REV A01

Table 4-45. MODE SELECT Mode Parameter Block Descriptor — Field Descriptions

Field

Name

Description

Density

Code

This field must contain one of the Density Code values listed below:

Density

Code Description

00h Use default density

48h 133,000 bpi, 56 logical tracks, serial cartridge tape

110.0 GB / 220.0 GB (Super DLTtape I)

49h 190,000 bpi, 56 logical tracks, serial cartridge tape

160.0 GB / 320.0 GB (Super DLTtape I)

4Ah 233,000 bpi, 40 logical tracks, serial cartridge tape

300.0 GB / 600.0 GB (Super DLTtape II)

50h 175,000 bpi, 60 logical tracks, serial cartridge tape

80.0 GB / 160.0 GB (VStape I)

7Fh No change from previous density (No Operation)

Number

of Blocks

Must be set to 0, indicating that all of the remaining logical blocks on the tape have

the medium characteristics specified by this block descriptor.

Block

Length

Specifies the length, in bytes, of each logical block transferred. A block length of 0

indicates that the length is variable (specified in the I/O command). Any value other

than 0 indicates the number of bytes per block to use for READ, WRITE, and

VERIFY commands that specify a Fixed bit of 1 (i.e., Fixed Block Mode), which

also causes the transfer length in the CDB to be defined as a block count. If the

Fixed bit is not set to 1, the drive ignores this field. The value in this field must be a

multiple of 4.

1. The Density Code must match a supported density of the tape cartridge currently mounted in the

SDLT tape drive.

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Quantum 1200 Series DAT Autochanger Guía de usuario Pagina 116