4-3.15 Read Block Limits Command 05H; 4-3.15.1 Read Block Limits Cdb Description; Table 4-61. Read Block Limits Field Description; Table 4-62. Read Block Limits Data - Fujitsu M2488 Product Manual

TAPE UNIT SCSI COMMANDS
4-3.15 READ BLOCK LIMITS command 05h
The READ BLOCK LIMITS command requests the target's block length limits for the logical unit.
The READ BLOCK LIMITS data, shown in Table 4-62, is sent during the DATA IN phase of the
command.
4-3.15.1 READ BLOCK LIMITS CDB Description
READ BLOCK LIMITS is a six-byte command. The bytes are as shown below and described in
Table 4-61. Common fields are described in paragraph 4-3.1 on page 4-4.
BYTES 7
0 0
1
2
3
4
5
Note: Changeable fields in the CDB are shaded.

Table 4-61. READ BLOCK LIMITS Field Description

BYTE BIT VALUE
0 0-7
Variable and fixed length blocks are supported. Refer to Table 4-62 for the READ BLOCK LIM-
ITS data.
BYTE BIT VALUE
0 0-7
1-3 040000h (262,144)
4-5
4-68
6 5 4
0 0 0
LUN
Reserved
05h Operation code.

Table 4-62. READ BLOCK LIMITS Data

Reserved.
The maximum block length is the maximum number of bytes the host can
request via a read or write operation.
The maximum block length conforms to the maximum specified in the
ANSI Extended Magnetic Tape Format for Information Interchange 36
Track, Parallel Serpentine proposed specification X3B5/94-043 section
8.2.
0001h The minimum block length supported is one byte. The minimum block
length indicates the minimum number of bytes that can be read from or
written to the MTU.
CG00000-011503 REV. A
M2488 PRODUCT GUIDE
BITS
3 2
0 1
Reserved
Reserved
Reserved
Reserved
DESCRIPTION
DESCRIPTION
1 0
0 1
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April 1997