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Raid and 3TB drive reliability

post #1 of 2
Thread Starter 
Basically I am looking to store Data on a server and be able to access and stream it to mobile devices around the house.

I need 6TB in Storage. I figure Raid 10 is the best option(Let me know if it should be otherwise), I can just get 4 3TB drives.

How reliable are the 3TB drives? Which 3TB drive would you consider most reliable. I know generally Green/Eco drives have a higher rate of failure than their performance oriented counterparts.
post #2 of 2
In general, the higher the drive capacity, the less reliable it is. Most SATA consumer drives have an unrecoverable read error rate of 10^14, or 1 block in every 12TB. So statistically, on a hypothetical 12TB drive you are guaranteed a read error. For enterprise drives, the reliability is a little higher, around 1 in 10^16. You need to be aware that if you are planning to use more than two drives in a RAID array, that you cannot use consumer drives, and should use enterprise drives. You will find explicit directions to this effect on both Western Digital and Seagate web sites. It has to do with the way that consumer drives respond to read failures (they will frequently retry reads for up to minutes at a time), which is inappropriate when the drive is a member of a redundant array. Please see the following link from Western Digital for advice regarding use of consumer drives in a RAID array. You will find similar advice from Seagate on their website. Here is another link from WD giving more details on why one should not use a consumer drive in a RAID array.

Unfortunately, this also means that you will be limited to a maximum 2TB disk as the only 3TB disks I am aware of are consumer drives. I use Western Digital RE4 drives in my RAID 10 array. I also deliberately chose to use smaller 1TB drives in my RAID array to even further limit the possibility of failure. There is a good discussion here on RAID reliability that will give you some further insight.
Edited by complexlogic - 10/23/11 at 7:01am
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Desktop
(13 items)
 
  
CPUMotherboardGraphicsRAM
i7-2600k @ 4.6Ghz 24/7 Asrock Fatal1ty Pro Gen3 POV 570 GTX 2.5GB, Inno3D 8800GT 16GB Gskill Ripjaw X 
Hard DriveOptical DriveOSMonitor
Crucial M4 512GB, 4xWDRE4 1TB RAID10 OCZ60GB Cache LG BH10 Bluray Writer Win7 x64 GPT Dell U2711 + Samsung 2232BW 
KeyboardPowerCaseMouse
Corsair Vengeance K90 Corsair TX950W Fractal Design Define XL Cyborg R.A.T 7 
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