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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
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6.2.1 Create RAID Group
This function creates RAID groups.
A RAID group is a group of drives that configure a RAID type.
Features and required number of drives for each RAID type
The following table shows the features and the required number of drives for each RAID type.
Note that "Striping (RAID0)" has no data redundancy.
*1: D: Data drives, M: Mirror drives, P: Parity drives
The maximum number of RAID groups for each model
The maximum number of RAID groups varies depending on each model. The following table shows the
maximum number of RAID groups for each model.
RAID type Feature Required number of drives
High Performance
(RAID1+0)
The high I/O performance of RAID0 (striping) is combined
with the reliability of RAID1 (mirroring).
2D+2M – 16D+16M
High Capacity
(RAID5)
Data divided into units of blocks and allocated across
multiple drives together with parity information created
from the data.
2D+1P – 15D+1P
High Reliability
(RAID6)
The use of double parity allows the full recovery of lost
data even in the event that two of the drives fail.
3D+2P – 14D+2P
Reliability (RAID5+0)
Multiple RAID5 volumes are RAID0 striped. For large
capacity configurations, use of RAID5+0 instead of RAID5
results in enhanced performance, improved reliability,
and shorter rebuilding times.
(2D+1P) × 2 – (15D+1P) × 2
Mirroring (RAID1)
Data is mirrored to two drives.
If one drive fails, the other drive continues operation
(mirroring).
1D+1M
Striping (RAID0)
Data is split in unit of blocks and stored across multiple
drives (striping).
RAID0 has no data redundancy.
2D – 16D
Model The maximum number of RAID
groups
ETERNUS DX80 S2 60
ETERNUS DX90 S2 120
ETERNUS DX410 S2 240
ETERNUS DX440 S2 480
ETERNUS DX8100 S 48
ETERNUS DX8700 S2 1536