Specifications

! 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
00hReserved16
00h
00h
(MSB) Cache Segment Size
(LSB)
14-15
1AhNumber of Cache Segments13
00hReservedDRALBCSS[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
04hRCD[MF]WCESIZE[DISC][CAP][ABPF][IC]2
12hPage Length = 12h1
88hPage Code = 08hRSVD=0PS0
01234567
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