Disks

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SATA Disk selection

Choosing disks is now a major problem with recent restraining of features for RAID (like on all recent WD firmwares for "desktop-class" disks). Interresting info:

Benchmarks:

Disks NOT-FOR-RAID

Name Models Size Cache (MB) Sector Size Class SDTR (Mbps) Power (stdb/op) (W) Noise (stdb/op) (dB) Green? Price (€)
WD Caviar Green WD20EARS 2TB 64 4kB desktop 110 4/6 24/29 Y 110
WD Caviar Green WD20EADS 2TB 32 512B desktop 110 4/6 24/29 Y 110

Disks for RAID

Name Models Size Cache (MB) Sector Size Class SDTR (Mbps) Power (stdb/op) (W) Noise (stdb/op) (dB) RAID Cert Green? Price (€)
WD RE4 WD2003FYYS 2TB 64 512B enterprise 138 8/11 29/34 Y N 265
WD RE4-GP WD2002FYPS 2TB 64 512B enterprise 110 4/7 25/29 Y Y 240
Hitachi Ultrastar A7K2000 HUA722020ALA330 HUA722010CLA330 HUA722050CLA330 2TB 32 512B enterprise 134 6/11 29 Y N 315
Hitachi Deskstar 7K2000 HDS722020ALA330 2TB 32 512B desktop  ? 8/? 29 N N 120
Seagate Constellation ES ST32000644NS 2TB 64 512B enterprise 140 6/9 27/33 Y N 290
Seagate Barracuda XT ST32000641AS 2TB 64 512B desktop 138 6/9 28/32 Y N 230
Seagate Barracuda LP ST32000542AS 2TB 32 512B desktop 95 (5900 RPM) 5/7 25/26 N Y 110
Seagate Barracuda 7200.11 ST31500341AS 1.5TB 32 512B desktop 135 5/9 26/32 Y Y
Seagate Barracuda 7200.11 ST31000333AS 1TB 32 512B desktop 120 5/9 25/31 Y Y

Legend:

  • SDTR: sustained data transfer rate
  • RAID Cert: RAID certified by vendor

Issues

New 4k sector size

Readings:

What to expect on GNU/Linux:

Tools