Fujitsu Eternus DX60 User Manual page 22

Chapter 1 Overview
> 1.1 System Features
High reliability supports 24/7/365 operation
• Duplication of important components
Important components such as controllers (for dual-controller model), power supply units, and
fans are duplicated to continue the operation in the case of unexpected failure. Also this
allows the hot swapping of failed components with the device power on. In addition, the latest
firmware can be applied during system operation.
• Various supported RAID levels
The ETERNUS DX60/DX80 supports RAID5+0 that is superior to RAID5 in reliability and
performance, and RAID6 that responds to the double failure of disks, as well as RAID1,
RAID1+0, and RAID5. A flexible RAID configuration can be selected.
• Redundant copy ensures disk redundancy
The ETERNUS DX60/DX80 diagnostic routines test the disks in order to predict failures
before they happen. When a disk requires preventive maintenance, a hot spare is
automatically switched in to replace it, providing continued data redundancy and stable
operation.
• Block Guard ensures data integrity
The ETERNUS DX60/DX80 adds check codes and check them at multiple checkpoints on
data transfer path to ensure the data integrity.
• System Capacitor Unit (SCU)
A SCU that does not need to be regularly replaced is installed as a backup power source in
case of a power failure. If the power fails, the SCU enables the cache memory data to be
saved to flash memory. Therefore, unlike a battery, the SCU does not have a time limit to save
data. The SCU is charged so quickly that write performance is recovered right after power
recovery.
E-mail notification
If an error occurs in the ETERNUS DX60/DX80, the details can be sent to a specified e-mail
address.
Strengthening security against information leaks
• Data encryption to prevent information leaks
Data can be encrypted and written. Data encryption can prevent information leaks caused by
fraudulent decoding even if the disk is stolen.
• Protection against fraudulent access
The ETERNUS DX60/DX80 supports SSL/SSH that encrypts and communicates information
on the network. This protects against malicious use of data and fraudulent access to devices
via a Web browser (GUI) or CLI.
P3AM-3042-03ENZ0 ETERNUS DX60/DX80 Disk storage system User Guide
Data encryption may not be possible for some configurations.
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Copyright 2009 FUJITSU LIMITED