Hitachi HDT725025VLA380 - Deskstar 0A33423 T7K500 250GB SATA 7200RPM 8MB Cache Hard Drive Specifications page 136

Note 1 - The Absolute HDA Temperature History is preserved across power cycles with the requirement that when
the drive powers up, a new entry is made in the history queue of 80h, an invalid absolute temperature value. This
way an application viewing the history can see the discontinuity in temperature result from the drive being turned
off.
Note 2 - When the Absolute HDA Temperature history is cleared, for new drives or after changing the Logging
Interval, the Queue Index shall be set to zero and the first queue location shall be set to the current Absolute HDA
Temperature value. All remaining queue locations are set to 80h.
Deskstar T7K500 Hard Disk Drive Specification
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