● Migration among RAID Groups
•
RAID Migration
The performance of the current RAID groups may not be satisfactory due to conflicting volumes after perform-
ance requirements have been changed. Use RAID Migration to improve the performance by redistributing the
volumes amongst multiple RAID groups.
● Changing the RAID Level
•
RAID Migration (to a RAID group with a different RAID level)
Migrating to a RAID group with a different RAID level changes the RAID level of volumes. This is used to con-
vert a given volume to a different RAID level.
•
Logical Device Expansion (and changing RAID levels when adding the new drives)
The RAID level for RAID groups can be changed. Adding drives while changing is also available. This is used to
convert the RAID level of all the volumes belonging to a given RAID group.
● Striping for Multiple RAID Groups
•
Wide Striping
Distributing a single volume to multiple RAID groups makes I/O access from the server more efficient and im-
proves the performance.
1. Function
Optimization of Volume Configurations
58
FUJITSU Storage ETERNUS AF250 S2, ETERNUS AF250 All-Flash Arrays
Design Guide (Basic)
Copyright 2019 FUJITSU LIMITED
P3AG-1822-09ENZ0
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