User manual

Hitachi hard disk drive specifications
98
Byte
Size
Field Name
Description
1:0
Word
Format
Version
Data table format version (=0002h)
3:2
Word
Sampling
Period
Absolute HDA Temperature sampling period
in minutes.
0000h indicates sampling is disabled.
5:4
Word
Interval
Timer interval between entries in the history
queue.
6
Byte
Max Op Limit
Maximum recommended continuous
operating temperature. This is a one byte 2‟s
complement number that allows a range
from -127°C to +127°C to be specified. 80h
is an invalid value. This is a fixed value.
7
Byte
Over Limit
Maximum temperature limit. This is a one
byte 2‟s complement number that allows a
range from -127°C to +127°C to be
specified. 80h is an invalid value. This is a
fixed value.
8
Byte
Min Op Limit
Minimum recommended continuous
operating limit. This is a one byte 2‟s
complement number that allows a range
from -127°C to +127°C to be specified. 80h
is an invalid value. This is a fixed value.
9
Byte
Under Limit
Minimum temperature limit. This is a one
byte 2‟s complement number that allows a
range from -127°C to +127°C to be
specified. 80h is an invalid value. This is a
fixed value.
29:10
Byte[20]
Reserved
31:30
Word
Queue Size
Number of entry locations in history queue.
This value is 128.
33:32
Word
Queue Index
Last updated entry in queue. Queue Index is
zero-based, so Queue Index 0000h is the
first location in the buffer (at offset 34). The
most recent temperature entered in the
buffer is at Queue Index + 34.
See Note 1 and Note 2.