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Chapter 6 RAID Group Management
6.2 Functions in the Action Area for RAID Group
ETERNUS Web GUI User’s Guide
Copyright 2013 FUJITSU LIMITED P2X0-1090-10ENZ0
178
• RAID Group Capacity
The capacity of RAID group that is to be created is displayed. The "RAID Group Capacity" is
automatically calculated from the selected RAID type and drives.
• Checkbox to select drives
Select the checkbox for the drive that is to be used.
When using the ETERNUS DX8100 S2/DX8700 S2, the restrictions that apply to the drive layout for
RAID group configuration vary depending on the RAID type. Refer to "Restrictions of drive layout"
(page 179) for details.
● Advanced Settings
Specify the Stripe Depth only when performing the advanced performance tuning for each RAID
group. It is not necessary to change the default setting for normal use.
The higher the Stripe Depth value, the lower the number of drives that access the RAID group. If
"High Performance (RAID1+0)" is used, the number of commands that are issued for the drives is
reduced and access performance for the relevant RAID group is improved. Note that for "High
Capacity (RAID5)", a high Stripe Depth value may reduce the sequential write performance. Also
note that restrictions apply for RAID groups and volumes in the RAID group for which Stripe Depth
value is changed. Refer to "Restrictions for Stripe Depth modification" (page 180)
for details.
- Stripe Depth
Select the Stripe Depth of RAID group that is to be created.
When the "RAID Type" is "Mirroring (RAID1)", this setting is not available. When the "RAID Type"
is "Reliability (RAID5+0)" or "High Reliability (RAID6)", the value is fixed to "64KB". Available
Stripe Depth value varies depending on the RAID type. Refer to "Available Stripe Depth value"
(page 180) for details.
→ A confirmation screen appears.
Drives can be selected from the list of drives that is displayed for Tabular or from the drive images
that are displayed for Graphic. Click the Tabular tab to display a list of the drives or click the Graphic
tab to display drive images.