Wide Striping; Figure 37 Wide Striping - Fujitsu ETERNUS AF250 Design Manual

1. Function
Optimization of Volume Configurations

Wide Striping

Wide Striping is a function that concatenates multiple RAID groups by striping and uses many drives simultane-
ously to improve performance. This function is effective when high Random Write performance is required.
I/O accesses from the server are distributed to multiple drives by increasing the number of drives that configure
a LUN, which improves the processing performance.

Figure 37 Wide Striping

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Wide Striping creates a WSV that can be concatenated across 2 to 24 RAID groups.
The number of RAID groups that are to be concatenated is defined when creating a WSV. The number of con-
catenated RAID groups cannot be changed after a WSV is created. To change the number of concatenated groups
or expand the group capacity, perform RAID Migration.
Other volumes (Standard, SDVs, SDPVs, or WSVs) can be created in the free area of a RAID group that is con-
catenated by Wide Striping.
WSVs cannot be created in RAID groups with the following conditions.
RAID groups that belong to TPPs or FTRPs
•
The RAID group that is registered as an REC Disk Buffer
•
• RAID groups with different stripe size values
RAID groups that are configured with different types of drives
•
RAID groups that are configured with RAID6-FR
•
Server
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FUJITSU Storage ETERNUS AF250 S2, ETERNUS AF250 All-Flash Arrays Design Guide (Basic)
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