Quantum LTO 4, Руководство пользователя

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SCSI Commands: 32BREAD POSITION Page 147
Field Bytes Bits Description
Number of
blocks in
buffer 13-15 This field is not supported and is always 0.
Number of
bytes in
buffer 16-19 This field is not supported and is always 0.
Reserved All bits are 0.
The First Block Location and the Last Block Location are both set to the number of
blocks and file marks between BOP and current logical position. If the tape is at
BOP, 0 is returned in these fields. The Beginning of Partition (BOP) flag is set if the
Block Location fields are zero.
The following table shows the fields in the READ POSITION Data when Long and
TCLP bits are set to one.
Byte Bits
7 6 5 4 3 2 1 0
0 BOP EOP Reserved MPU BPU Reserved
1 Reserved
2 Reserved
3 Reserved
4 (MSB)
5
6
7
Partition Number (0)
(LSB)
8 (MSB)
9
10
11
12
13
14
15
Block Number
(LSB)
16 (MSB)
17
18
19
20
21
22
23
File Number
(LSB)
24 (MSB)
25
26
27
28
29
30
31
Set Number (0)
(LSB)