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100

101

SCSI Commands

Quantum DLT 4000 Tape Drive 5-121

READ BLOCK LIMITS Command (05h) (continued)

The READ BLOCK LIMITS data shown as follows is sent during the DATA IN

phase of the command. The command does not reflect the currently selected

block size, only the available limits. MODE SENSE is the command that returns

the current block size.

Bit

Byte

7 6 5 4 3 2 1 0

0 Reserved

1 - 3

(MSB)

Maximum Block Length

(LSB)

4 - 5

(MSB)

Minimum Block Length (0001h)

(LSB)

Figure 5–58 READ BLOCK LIMITS Data - Data Format

Table 5–57 READ BLOCK LIMITS Data - Field Descriptions

Field Name Description

Maximum Block Length The value in this field indicates the maximum block size. The tape

drive supports a maximum block length of 16,777,215 (16 MB-1) for

10 GB or 20 GB format. A maximum block length of 256 K bytes is

supported for 2.6 GB or 6.0 GB formats.

Minimum Block Length The value in this field indicates the minimum block size. The tape

drive supports a minimum block length of 1 byte.

1 2 ... 216 217 218 219 220 221 222 223 224 225 226 ... 299 300

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