Disks - Fujitsu Eternus DX60 User Manual

Chapter 1 Overview
> 1.2 Configuration
User Disk
Figure 1.9
IMPORTANT
1.2.5

Disks

Three kinds of drives can be installed in the device: SAS disks, Nearline SAS disks, and SSDs.
Each is suitable for the following usage cases:
• SAS Disk
SAS disks are highly-performance/high-reliability disks for enterprise use. SAS disks support
24/7/365 operations and are used to store high performance databases and other frequently
accessed data.
• Nearline SAS Disk
Nearline SAS disks are high capacity / cost effective disks for data backup and archive use.
Nearline SAS disks can store information that requires a lower access rate at a still
reasonable speed more cost effectively than the SAS disks.
• SSD (Solid-State Drive)
SSDs are highly-performance/high-reliability drives for enterprise use. SSDs support 24/7/
365 operations and are used to store high performance databases and other frequently
accessed data. SSDs use flash memory as their storage media and provide better random
access performance than SAS and Nearline SAS hard disks. Containing no motors or other
moving parts, SSDs are highly resistant to impact and have low power consumption require-
ments.
P3AM-3042-03ENZ0 ETERNUS DX60/DX80 Disk storage system User Guide
User Disk User Disk
Failure
Hot Spares
Do
CAUTION
• If a disk configured in a RAID1, RAID1+0, RAID5, RAID5+0, or
RAID6 group fails, contact your maintenance engineer immediately
as the failed disk should be replaced at once. If another disk fails
before the first disk that failed is replaced, the data of the second
disk may be lost.
System disks cannot be registered as hot spares.
Hot Spare
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