Configuration; Raid Level - Fujitsu Eternus2000 Manual

1.2 Configuration

1.2 Configuration
This chapter describes items to be noted before configuring the ETERNUS2000 systems.
1.2.1

RAID Level

This section describes the supported RAID level and usage (RAID level selection criteria), and RAID
group configuration.
Supported RAID levels and mechanism
ETERNUS2000 supports the following RAID levels.
• RAID0 (striping)
• RAID1 (mirroring)
• RAID1+0 (striping of pairs of disks for mirroring)
• RAID5 (striping with distributed parity blocks)
• RAID6 (striping with distributed double parity blocks) (*1)
Each RAID level description is shown below.
4
*1: RAID6 ensures data safety and continues system operation in the case of a second malfunction within a
single RAID group. RAID6 redundancy allows high availability system operation.
Do
CAUTION
Remember that a RAID0 configuration is not redundant. This means that if
a RAID0 disk drive fails, the data will not be recoverable.
Therefore, using RAID1, RAID1+0, RAID5, or RAID6 configuration is rec-
ommended.
ETERNUS2000 disk storage system User Guide
Copyright 2009 FUJITSU LIMITED
P3AM-2512-03EN