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Just since I was looking at large storage drives, you guys might find this useful: https://www.backblaze.com/blog/what-hard-drive-should-i-buy/ A data backup service's 3-year check in with what HDD works in their massive IT system with some nice breakdowns of failure rates.
Could be useful for comparisons!
Would you like me to see if I can add Reds or Blacks ?
Greens are bad they only run at 5400RPM.
If you have a fairly powerful computer and you use a WD Green, you are adding a weak point to your system. The hard drive is not a component you can just cheap out on and still expect snappy performance - your load, write and read times will keep you waiting and often leave you frustrated. Either prioritise quality over quantity (WD Caviar Black 1TB instead of WD Caviar Green 2TB) or just take the jump in price.
Right, here's more information straight from Western Digital about why not to use Blues, Greens, or even Blacks in any RAID beyond a simple two drive 0 or 1 configuration.
http://wdc.custhelp.com/app/answers/detail/a_id/1397/~/difference-between-desktop-edition-%28wd-blue,-wd-green-and-wd-black%29-and-raid
*edit
Forgot to point out that they also explicitly state that Reds are specifically designed for NAS use, so those are the way to go if that's what you're looking for. My house's FreeNAS server currently has 8 of the 3TB Reds in a double redundancy ZFS setup, and we have had zero issues in the year and a half or so it's been running.
Red! For NAS durability!
What Grizzle08 said. Blacks over greens.
Hey everyone you want WD Blacks or Reds. Greens are really only best for back up files that are accessed rarely. If you put them in a NAS they will die regularly.