4-34
– "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
(e) "Span": Sets Span.
Parameter Remarks
CANSPAN SPAN=YES
NOSPAN SPAN=NO
When SPAN setting is available for the hard disk configuration of the pack, "YES" is displayed by default.
When performing SPAN, create 2 or more sets of the same pack at pack creation. (For SPANNING OF
RAID1 creation; refer to "Setting SPAN" described later for detailed procedures.)
SPANNING
9. When all settings are completed, select "Accept" and then press Enter to create logical drive. The created logical
drive is displayed in the "Logical Drive Configured" screen.
10. After creating logical drive, press Esc to close the screen. Go back to the "Save Configuration?" screen and then
select "Yes" to save the configuration.
11. When the confirmation message shows that the configuration was saved, press Esc to return to the TOP menu
screen.
12. In the TOP menu screen, select "Objects" → "Logical Drive" → "View/Add Parameters" to check logical drive
information. Setting values for "Write Policy," "Read Policy" and "Cache Policy" can be changed.
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