Raid Functions; Supported Raid - Fujitsu ETERNUS DX100 S4 Design Manual

2. Basic Functions
This chapter describes the functions that control the storage system.

RAID Functions

This section explains the points to note before configuring a system using the ETERNUS DX.

Supported RAID

The ETERNUS DX supports the following RAID levels.
RAID0 (striping)
•
• RAID1 (mirroring)
• RAID1+0 (striping of pairs of drives for mirroring)
• RAID5 (striping with distributed parity)
RAID5+0 (double striping with distributed parity)
•
RAID6 (striping with double distributed parity)
•
• RAID6-FR (provides the high speed rebuild function, and striping with double distributed parity)
Remember that a RAID0 configuration is not redundant. This means that if a RAID0 drive fails,
the data will not be recoverable.
This section explains the concepts and purposes (RAID level selection criteria) of the supported
RAID levels.
When Nearline SAS disks that have 6TB or more are used, the available RAID levels are RAID0,
RAID1, RAID6, and RAID6-FR.
Fujitsu Storage ETERNUS DX100 S4/DX200 S4, ETERNUS DX100 S3/DX200 S3 Hybrid Storage Systems Design Guide (Basic)
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