Log - IBM DDRS-39130 - Ultrastar 9.1 GB Hard Drive Specifications

7.8.1 Log Page parameters
Each log page begins with a four-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 four-bytes 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, or 3rd byte of each parameter header contains several fields.
DU The Disable Update bit is set to 0 which indicates 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-saveable and is set to 0 to
indicate the parameter is saveable.
TSD The Target Save Disable bit is set to zero which indicates the drive provides a target defined
method for saving log parameters.
ETC The enable Threshold Comparison bit is set to 0 which indicates the drive does not perform
comparisons between cumulative and any threshold values.
LBIN The List Binary bit is set to 1 for vendor unique pages whose parameters lists are in binary
format, not ASCII. This bit is reserved and set to 0 for all other pages.
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.
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O E M Spec. of DDRS-3xxxx