IBM IC35L036UWDY10 Hard Drive Specifications - Page 115

Force Sequential Write is ignored., Demand Read Retention Priority

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operates as if AWRE (Mode Page 1) is set to one. When WCE is set to zero indicates that the drive issues GOOD status for a WRITE command only after successfully writing the data to the media. Note: When WCE is set to one, a SYNCHRONIZE CACHE command must be issued to write the data in cache segments to be written to the media before powering down the drive. ! MF (Multiplication Factor) is ignored. ! RCD (Read Cache Disable) of one indicates that the drive does not use the data in the cache segments for a READ command. RCD of zero indicates that the drive may return some or all of the data from cache segments for READ. ! Demand Read Retention Priority is ignored. ! Write Retention Priority is ignored but must be 0h, 1h, or Fh. ! Disable Pre-fetch Transfer Length is ignored. ! Minimum Pre-fetch is ignored. ! Maximum Pre-fetch is ignored. ! Maximum Pre-fetch ceiling is ignored. ! FSW (Force Sequential Write) is ignored. ! LBCSS (Logical Block Cache Segment Size) of one indicates that the unit of Cache Segment Size is logical block. When LBCSS is set to zero, the units is byte. ! DRA (Disable Read Ahead) of one requests that the drive not read into the buffer any logical block beyond the addressed logical block. When DRA is set at zero, the drive may continue to read logical blocks into the buffer beyond the addressed logical block. ! Number of Cache Segments is used to select the number of cache segments. This field is valid only when SIZE is set at zero. It is ignored when SIZE is set to one. The drive supports a value of 1 to 255 as the number of Cache Segment. ! Cache Segment Size is the requested cache segment size in byte or logical block, depending upon LBCSS. Cache Segment Size is valid only when SIZE is set to one. ! Non Cache Segment Size is ignored. Ultrastar 146Z10 hard disk drive specifications 99

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operates as if AWRE (Mode Page 1) is set to one. When WCE is set to zero indicates that the drive
issues GOOD status for a WRITE command only after successfully writing the data to the media.
Note:
When WCE is set to one, a SYNCHRONIZE CACHE command must be issued to write the data
in cache segments to be written to the media before powering down the drive.
!
MF
(Multiplication Factor) is ignored.
!
RCD
(Read Cache Disable) of one indicates that the drive does not use the data in the cache
segments for a READ command. RCD of zero indicates that the drive may return some or all of the
data from cache segments for READ.
!
Demand Read Retention Priority
is ignored.
!
Write Retention Priority
is ignored but must be 0h, 1h, or Fh.
!
Disable Pre-fetch Transfer Length
is ignored.
!
Minimum Pre-fetch
is ignored.
!
Maximum Pre-fetch
is ignored.
!
Maximum Pre-fetch ceiling
is ignored.
!
FSW
(Force Sequential Write) is ignored.
!
LBCSS
(Logical Block Cache Segment Size) of one indicates that the unit of Cache Segment Size is
logical block. When LBCSS is set to zero, the units is byte.
!
DRA
(Disable Read Ahead) of one requests that the drive not read into the buffer any logical block
beyond the addressed logical block. When DRA is set at zero, the drive may continue to read logical
blocks into the buffer beyond the addressed logical block.
!
Number of Cache Segments
is used to select the number of cache segments. This field is valid only
when SIZE is set at zero. It is ignored when SIZE is set to one. The drive supports a value of 1 to 255
as the number of Cache Segment.
!
Cache Segment Size
is the requested cache segment size in byte or logical block, depending upon
LBCSS. Cache Segment Size is valid only when SIZE is set to one.
!
Non Cache Segment Size
is ignored.
Ultrastar 146Z10 hard disk drive specifications
99