NEC 140He User Manual page 108

4-36
7.
Press F10 to create logical drive. The "Logical Drives Configure" screen appears.
8.
Select "RAID," "Size" or "Advanced Menu" by using cursor keys. Then press Enter to fix the selection and
set each value. Selecting "Advanced" displays the Advanced screen.
– "RAID": Sets RAID level.
Parameter
0
1
5
The selectable RAID level varies depending on the number of hard disks that configure a pack.
– "Size": Sets logical drive size.
Up to 40 logical drives can be created per disk array controller.
– "Advanced Menu"
(a) "Stripe Size": Sets stripe size.
Parameter
248
16
32
64
128
(b) "Write Policy": Sets write policy.
Parameter
WRTHRU
WRBACK
(c) "Read Policy": Sets read policy.
Parameter
NORMAL
READAHEAD
ADAPTIVE
(d) "Cache Policy": Sets cache policy.
Parameter
Cached IO
Direct IO
Remarks
-
-
-
Remarks
–
–
–
Default display: recommended set value
Remarks
Write through
Write back (Default display)
Remarks
Does not perform read ahead.
Default display: recommended set value
Read ahead
Performs read ahead when sequential
sectors are accessed twice
consecutively.
Remarks
Caches the data read from a hard disk
and then transfers it to the server.
Default display: recommended set value