Expand Raid Group - Fujitsu ETERNUS DX60 S3 User Manual

Chapter 5 RAID Group Management

5.5 Expand RAID Group

5.5

Expand RAID Group

This function adds drives to the existing RAID group by using the Logical Device Expansion (LDE) function to
dynamically expand RAID group capacity. This function can also dynamically change the RAID level of an
existing RAID group.
RAID Group Expansion provides the following features without stopping the ETERNUS DX operation:
• RAID Group Expansion adds disks to the existing RAID group in units of one drive. This enables capacity
expansion of RAID groups with smaller number of drive expansion.
• RAID groups can be expanded and any existing data in these RAID groups is retained.
Requirements for RAID groups to expand capacity
• The "Status" is "
• Standard volumes, SDVs, or SDPVs are registered
• WSV type volumes are not registered
• Not registered in the TPP
• Not registered in the FTRP
• Not registered as an REC Disk Buffer
• Not registered as an EXCP
• RAID level is not "Reliability (RAID5+0)" or "Reliability (RAID6-FR)"
• The RAID group is not blocked
• Rebuild, copyback, or redundant copy is not being performed
• One of the following functions is not being performed for the volume that is registered in the RAID group
- Format volume
- Expand volume
- RAID migration
- Encrypt volume
• Storage Migration paths are not created in the volume that is registered in the RAID group
• The stripe size of the RAID group is not expanded (*1)
*1: A RAID group for which the Stripe Depth value in the [RAID Group (Basic)] screen of the [RAID Group (Basic Infor-
mation)] screen is 128KB or more. Note that the Stripe Depth value for RAID1 cannot be changed. Refer to "RAID
Group (Basic)" in "ETERNUS Web GUI User's Guide (Operation)" for details.
Requirements for the ETERNUS DX to expand capacity
• The cache mode is "Write Back Mode"
• LDE is not being performed
• RAID group diagnosis is not being performed
• Disk diagnosis is not being performed
• Application of controller firmware is not being performed
• Application of disk firmware is not being performed
Available"
540
ETERNUS Web GUI User's Guide (Settings)
Copyright 2015 FUJITSU LIMITED P2X0-1270-13ENZ0