Log - Hitachi HUS151473VL3800 - Ultrastar 73.4 GB Hard Drive Specifications

17.7.1 Log Page parameters
Each log page begins with a 4-byte page header followed by zero or more variable-length log parameters.
Page header
Page Code field identifies which log page is being transferred.
The Page Length field specifies the length in bytes of the following log parameters.
Log parameters
Each log parameter begins with a 4-byte parameter header followed by one or more bytes of parameter value data.
The Parameter Code field identifies which log parameter is being transferred for that log page.
The Parameter Control field, the 3rd byte of each parameter header, contains several fields.
- DU The Disable Update bit is set to 0 to indicate that the drive updates the log parameter value to reflect events that
should be noted by that parameter.
- DS The Disable Save bit is set to 1 to indicate the parameter is non-savable and is set to 0 to indicate that the
parameter is savable.
- TSD The Target Save Disable bit is set to zero to indicate that the drive provides a Target defined method for sav-
ing log parameters.
- ETC The enable Threshold Comparison bit is set to 0 to indicate the drive does not perform comparisons between
cumulative and any threshold values.
- TMC The Threshold Met Criteria field is not valid because this drive does not perform threshold comparisons.
This field is set to 0.
- LBIN The List Binary bit is only valid if the LP is 1. If the LP bit is 1 and the LBIN bit is 0, then the list parameter
is a string of ASCII graphic code (20h - 7Eh). If the LP bit is 1 and the LBIN bit is 1, then the list parameter is a list
of binary information.
- LP The List Parameter bit is set to 0 for parameters that are data counters. The LP bit is set to 1 for parameters that
are lists.
Hitachi Ultrastar 15K147 SCSI Hard Disk Drive Specification
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