Fujitsu ETERNUS DX80 S2 Overview

Also see for Eternus DX80 S2: User guide User guide Configuration guide Configuration guide Configuration guide

Contents

Chapter 4 System Configuration4.4 DrivesETERNUS DX80 S2/DX90 S2 Disk storage system OverviewCopyright 2013 FUJITSU LIMITED P3AM-4812-11ENZ0404.4 DrivesThe ETERNUS DX Disk storage system supports the latest drives that have the high-speed Serial Attached SCSI(6Gbit/s) interface.SAS disks, Nearline SAS disks, and SSDs can be installed in the ETERNUS DX Disk storage system. Some drivetypes have a data encryption function.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 consumptionwhen 2.5" drives are installed is less than when the same number of 3.5" drives is installed.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 issuperior to a 3.5" drive configuration since more 2.5" drives can be installed in an enclosure than 3.5" drives.■ Drive types● SAS disksSAS disks are reliable disks with high performance. SAS disks are used to store high performancedatabases and other frequently accessed data.● Nearline SAS disksNearline SAS disks are high capacity cost effective disks for data backup and archive use. Nearline SASdisks can store information that requires a low access rate at a reasonable speed more cost effectively thanSAS disks.• Nearline SAS disks are used to store data that does not need the access performance of SAS disks.They are far more cost effective than SAS disks. (It is recommended that SAS disks be used for datathat is constantly accessed or when high performance/reliability is required.)• If the ambient temperature exceeds the operating environment conditions, Nearline SAS diskperformance may be reduced.• Nearline SAS disks can be used as Advanced Copy destinations and for the storage of archived data.• When Nearline SAS disks are used as an Advanced Copy destination, delayed access responses andslower copy speeds may be noticed, depending on the amount of I/O and the number of copysessions.