IBM IC35L036UWDY10 Hard Drive Specifications - Page 114

Mode Caching Parameters, Verify Recovery Time Limit

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! Verify Recovery Time Limit is a timer for the maximum command execution time (AVERP is set to one, Mode Page 0) or the maximum accumulated ERP time (AVERP is zero). The unit of timer value is 1 ms which must be from 40 ms to 65535 ms (65.5 seconds). If time out occurs, a CHECK CONDITION will be returned. 8.8.8 Mode Page 8 (Caching Parameters) Bit Byte 7 6 5 4 3 2 1 0 0 PS RSVD=0 Page Code = 08h 1 Page Length = 12h 2 [IC] [ABPF] [CAP] [DISC] SIZE WCE [MF] RCD 3 Demand Read Retention Priority (ignored) Write Retention Priority (ignored) 4-5 Disable Pre-fetch Transfer Length (ignored) 6-7 Minimum Pre-fetch (ignored) 8-9 Maximum Pre-fetch (ignored) 10-11 Maximum Pre-fetch Ceiling (ignored) 12 [FSW] LBCSS DRA Reserved 13 Number of Cache Segments 14-15 (MSB) Cache Segment Size 16 17-19 (MSB) Reserved Non Cache Segment Size (ignored) (LSB) (LSB) Default 88h 12h 04h 00h FFh FFh 00h 00h FFh FFh FFh FFh 00h 1Ah 00h 00h 00h 000000h Figure 93. Page 8 (Caching Parameters) The caching parameters page defines parameters that affect the use of the cache. ! IC (Initiator Control) is ignored. The drive will always use the Number of Cache Segments or Cache Segment Size fields. ! ABPF (Abort Pre-Fetch) is ignored. ! CAP (Caching Analysis Permitted) is ignored. ! DISC (Discontinuity) is ignored. ! SIZE (Size Enable) of one indicates that the Cache Segment Size is used to control caching segmen- tation. When SIZE is set to zero, the Number of Cache Segments is used. ! WCE (Write Cache Enable) of one indicates that the drive may issue GOOD status for a WRITE command after successfully storing the data to a cache segment. When WCE is set to one, the drive Ultrastar 146Z10 hard disk drive specifications 98

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!
Verify Recovery Time Limit
is a timer for the maximum command execution time (AVERP is set to
one, Mode Page 0) or the maximum accumulated ERP time (AVERP is zero). The unit of timer value
is 1 ms which must be from 40 ms to 65535 ms (65.5 seconds). If time out occurs, a CHECK
CONDITION will be returned.
8.8.8 Mode Page 8 (Caching Parameters)
000000h
(MSB)
Non Cache Segment Size (ignored)
(LSB)
17-19
00h
Reserved
16
00h
00h
(MSB)
Cache Segment Size
(LSB)
14-15
1Ah
Number of Cache Segments
13
00h
Reserved
DRA
LBCSS
[FSW]
12
FFh
FFh
Maximum Pre-fetch Ceiling (ignored)
10-11
FFh
FFh
Maximum Pre-fetch (ignored)
8-9
00h
00h
Minimum Pre-fetch (ignored)
6-7
FFh
FFh
Disable Pre-fetch Transfer Length (ignored)
4-5
00h
Write Retention Priority
(ignored)
Demand Read Retention
Priority (ignored)
3
04h
RCD
[MF]
WCE
SIZE
[DISC]
[CAP]
[ABPF]
[IC]
2
12h
Page Length = 12h
1
88h
Page Code = 08h
RSVD=0
PS
0
0
1
2
3
4
5
6
7
Default
Bit
Byte
Figure 93. Page 8 (Caching Parameters)
The caching parameters page defines parameters that affect the use of the cache.
!
IC
(Initiator Control) is ignored. The drive will always use the Number of Cache Segments or Cache
Segment Size fields.
!
ABPF
(Abort Pre-Fetch) is ignored.
!
CAP
(Caching Analysis Permitted) is ignored.
!
DISC
(Discontinuity) is ignored.
!
SIZE
(Size Enable) of one indicates that the Cache Segment Size is used to control caching segmen-
tation. When SIZE is set to zero, the Number of Cache Segments is used.
!
WCE
(Write Cache Enable) of one indicates that the drive may issue GOOD status for a WRITE
command after successfully storing the data to a cache segment. When WCE is set to one, the drive
Ultrastar 146Z10 hard disk drive specifications
98