Fujitsu ETERNUS DX60 S3 User Manual page 804

Appendix A Parameter List
A.3 Volume Management
■ Wide Striping Volume Setting
●
Volume Information
• Wide Stripe Size
Description
Input condition/
Display contents
•
If the basic size of the RAID group is 2MB or more, the basic size is specified for Wide Stripe Size even when
"Small" is selected.
•
When changing the number of concatenations for a WSV, select the same "Wide Stripe Size" as the migration
source WSV. For procedure to check "Wide Stripe Size" for the destination source WSV, refer to "Remarks" in
"When the migration destination volume is "WSV"" (page
"Wide Stripe Size" for an existing WSV can be changed by using the migration function.
Select the Wide Stripe Size for the migration destination WSV.
"Wide Stripe Size" is the size of the WSV Unit that is allocated to each RAID group in
series. It is not necessary to change the default setting (Normal) for normal use.
•
Normal
An integral multiple of the basic size for each RAID group (*1). The maximum size is
16MB or smaller.
The actual size varies according to the RAID group type, the number of member
drives, and Stripe Depth.
Select "Normal" to improve random write access performance.
•
Small
An integral multiple of the basic size for each RAID group. The maximum size is 2MB
or smaller.
The actual size varies according to the RAID group type, the number of member
drives, and Stripe Depth.
Note that because the segment size of the volume is small and many host accesses
among multiple RAID groups occur, the performance may be reduced according to
the amount of host I/O.
*1: The basic size (stripe size) when creating a volume. Refer to
each RAID Group" (page 1054)
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