Drives - Fujitsu ETERNUS DX100 S4 Design Manual

5. Hardware Configurations
Optional Product Installation Conditions

Drives

This section explains the installation conditions for drives.
■
Types of Drives
The ETERNUS DX supports the latest drives that have the high-speed SAS (Max. 12Gbit/s) interface.
The following drive types can be installed in the ETERNUS DX. Some drive types have a data en-
cryption function.
SAS disks
•
Nearline SAS disks
•
• SSDs
2.5" and 3.5" drive sizes are available.
Since 2.5" drives are lighter and require less power than 3.5" drives, the total weight and power
consumption when 2.5" drives are installed is less than when the same number of 3.5" drives is in-
stalled.
When the data I/O count is compared based on the number of drives in an enclosure (2.5" drives:
24, 3.5" drives: 12), the Input Output Per Second (IOPS) performance for each enclosure in a 2.5"
drive configuration is superior to a 3.5" drive configuration since more 2.5" drives can be installed in
an enclosure than 3.5" drives.
●
SAS Disks
SAS disks are high-performance and high-reliability disks. They are used to store high performance
databases and other frequently accessed data.
The following disks are Advanced Format (512e) disks.
•
1.8TB SAS disks
-
2.4TB SAS disks
-
- 2.5" SAS self encrypting disks (2.4TB)
• When using Advanced Format (512e) disks, make sure that Advanced Format (512e) is suppor-
ted by the server OS and the applications. If the server OS and applications do not support Ad-
vanced Format (512e), random write performance may be reduced.
●
Nearline SAS Disks
Nearline SAS disks are high capacity cost effective disks for data backup and archive use. Nearline
SAS disks can store information that requires a low access rate at a reasonable speed more cost
effectively than SAS disks.
Fujitsu Storage ETERNUS DX100 S4/DX200 S4, ETERNUS DX100 S3/DX200 S3 Hybrid Storage Systems Design Guide (Basic)
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