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Chapter 4 SCSI Commands
MODE SELECT (6) / (10) Command (15h / 55h)
DLT-S4 Interface Reference Guide
104
Mode Parameter Block
Descriptor
4
Figure 56
and
table 65
illustrate and describe the fields that make up the
MODE SELECT
command’s Mode Parameter Block Descriptor.
Figure 56
MODE SELECT
Mode Parameter Block
Descriptor — Data Format
Table 65
MODE SELECT
Mode Parameter Block
Descriptor — Field Descriptions
Bit
Byte
7
6
5
4
3
2
1
0
0
Density Code
1 — 3
(MSB)
Number of Blocks
(LSB)
4
Reserved
5 — 7
(MSB)
Block Length
(LSB)
Field
Description
Density Code
This field must contain one of the Density Code values listed below:
Density
Code
Description
00h
Use default density
49h
190,000 bpi, 56 logical tracks, serial cartridge tape
160 GB / 320 GB (Super DLTtape I)
1
4Ah
233,000 bpi, 40 logical tracks, serial cartridge tape,
300 GB / 600 GB (Super DLTtape II)
4Bh
256,000 bpi, 80 logical tracks, serial cartridge tape,
800 GB / 1600 GB (DLTtape S4)