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Page 44
Log Page Header
Field Descriptions
Log Parameter
Log
Supported Log Pages Log
Tape Usage Log
Tape Capacity Log
Data Compression Log
Only one log page is transferred to the host with each Log Sense command. The
Page Code field (Byte 2) of the CDB specifies the page to be transferred.
A four-byte page header precedes the parameter data for each page. The page
header specifies the page code returned and the length of that page in bytes.
Following the page header are the log parameters. Each log parameter is a data
structure that contains several description bytes followed by the parameter value
itself.
Log Page Header
First Log Parameter
...
Last Log Parameter
Bits
Byte
7
6
0
Reserved
1
2
3
Field
Bytes
Bits
Page
0
0-5
Code
Page
2-3
Length
Reserved
Bits
Byte
7
6
0
1
2
DU
DS
3
4 - n
See Page
45
48
48
49
Log Page Header is always returned.
Multiple Log Parameters are returned in each log
page. The log parameters are returned in
ascending order.
5
4
3
Page Code
Reserved
Page Length, MSB
Page Length, LSB
Description
Identifies the page being returned.
Indicates the length of the page in bytes that follow the page header.
If the allocation length specified in the CDB is too small to transfer
the entire requested page, this value is not adjusted to reflect the
truncation. However, if the Parameter Pointer field specifies a start-
ing parameter code other than zero, the page length is adjusted to
indicate the number of bytes that follow the page header.
All reserved bits must be 0.
5
4
3
Parameter Code, MSB
Parameter Code, LSB
TSD
ETC
TMC
Parameter Length
Parameter Value
LTO SCSI Interface Manual
2
1
0
2
1
0
LBIN
LP
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