Table 67 Feature Code List - Western Digital Ultrastar DC HC310 Specifications

Feature Code State Definition
0001h 0001h : Allow write cache operation to be determined by Set Feature command
0002h : Force write cache enabled
0003h : Force write cache disabled
If State 0001h is selected, the ATA Set Feature command will determine the operation state
of write cache. If State 0002h or 0003h is selected, write cache will be forced into the
corresponding operation state, regardless of the current ATA Set Feature state. Any attempt
to change the write cache setting through Set Feature shall be accepted, but otherwise
ignored, and not affect the operation state of write cache and complete normally without
reporting an error.
In all cases, bit 5 of word 85 in the Identify Device information will reflect the true operation
state of write cache, one indicating enabled and zero indicating disabled.
The default state is 0001h.
0002h 0001h : Enable Write Cache Reordering
0002h : Disable Write Cache Reordering
The default state is 0001h.
The drive does not return error for setting state 0002h, but the state is ignored.
0003h Set time interval for temperature logging.
0000h is invalid.
0001h to FFFFh logging interval in minutes.
This value applies to the Absolute HDA Temperature History queue. Issuing this command
will cause the queue to be reset and any prior values in the queue will be lost. Queue Index
shall be set to zero and the first queue location will be set to the current value. All remaining
queue locations are set to 80h. The Sample Period, Max Op Limit, Over Limit, Min Op Limit
and Under Limit values are preserved.
Default value is 0001h.
0004h-CFFFh Reserved
D000h-FFFFh Vendor Specific

Table 67 Feature Code List

Western Digital Hard Disk Drive OEM Specification
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