Disk Array; Raid Level - Fujitsu PRIMERGY RX200 S2 User Manual

1.1

Disk Array

A disk array or Redundant Array of Independent Disks (RAID) is a system that can improve
reliability compared to a single hard disk, by using a disk controller and multiple hard disks. Access
to each hard disk is controlled by the disk controller, but different control methods are used
depending on the RAID level settings. It is also possible to give the disk redundancy so that the
system can be operated continuously without losing data even when one hard disk fails.
1.2

RAID Level

Although there are several types of RAID level, the onboard SCSI array controller for this server only
supports RAID1. The number of available hard disks, available capacity and applicability of
redundancy are shown in the table below.
RAID level
RAID1
Regardless of the applicability of redundancy, data backup should be performed as
frequently as possible just in case.
For more details of RAID levels, refer to "A RAID Level" ( pg.54).
8
Number of hard disks
2
Available capacity
Capacity of 1 hard disk
Redundancy
Applied