NEC 140He - Manual (Page 108)

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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 Remarks
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 Remarks
248 –
16 –
32 –
64
Default display: recommended set value
128
(b) "Write Policy": Sets write policy.
Parameter Remarks
WRTHRU Write
through
WRBACK Write back (Default display)
(c) "Read Policy": Sets read policy.
Parameter Remarks
NORMAL
Does not perform read ahead.
Default display: recommended set value
READAHEAD Read ahead
ADAPTIVE Performs read ahead when sequential
sectors are accessed twice
consecutively.
(d) "Cache Policy": Sets cache policy.
Parameter Remarks
Cached IO
Caches the data read from a hard disk
and then transfers it to the server.
Direct IO Default display: recommended set value