Hitachi HDT725025VLA380 - Deskstar 0A33423 T7K500 250GB SATA 7200RPM 8MB Cache Hard Drive Specifications page 135

6 Byte
7 Byte
8 Byte
9 Byte
29:10 Byte[20]
31:30 Word
33:32 Word
(Queue Size+33):34 Byte[Queue Size]
511:(Queue Size Byte [512-Queue
+34) Size-34]
Max Op Limit Maximum recommended continuous operating
Over Limit
Over Limit
Under Limit
Reserved
Queue Size
Queue Index
Queue Buffer
Reserved
Deskstar T7K500 Hard Disk Drive Specification
121
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.
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.
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.
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.
Number of entry locations in history queue. This
value is 128.
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.
This is a circular buffer of absolute HDA Tem-
perature values. These are one byte 2's comple-
ment numbers, which allow a range from -127°C
to +127°C to be specified. A value of 80h indi-
cates an initial value or a discontinuity in temper-
ature recording. The Actual time between
samples may vary because commands may not be
interrupted. The sampling period is the minimum
time between samples. See Not 1.If the host
changes the logging interval using the volatile
option, the interval between entries in the queue
may change between power cycles with no indi-
cation to the host.