waldojim, on 18 May 2012 - 05:52 PM, said:
LiveBrianD, on 18 May 2012 - 05:42 PM, said:
Unless you're buying the cheapest, most generic external enclosure you can possibly find, the power supply is NOT likely to be an issue. Second, since you have an array anyway, why replace the drives every 3 years, when they probably still have a lot of life left? Come to think of it, the WD Green 1TB in the tivo is from 2009 I think (yep, 3 years) and has been run 24/7, and it has no issues. Yep, a low-end consumer drive with almost no downtime, and it's doing just fine.
How many external enclosures have you used? I have owned everything from the cheap little "simpletech" drives, to custom high end enclosures. The ONLY solid boxes I have owned that didn't blow up and toast their drives (after 2 years)- were top quality SCSI boxes. Not the slightest bit useful in this situation. The simpletech box lasted 6 months.
EDIT: Those WD Green drives have roughly 5 year lifespan with increasing chance of failure after year 3. Be happy it still works, but don't be surprised when it dies. I will be just fine, and quite happy with 3 brand new 2TB drives when I switch. Until the, I will be happy with what I have. Namely because - it works, and has worked reliably for some time now.
Right now, there are 3 WD Elements drives in the house, and all work perfectly. Admittedly, I had a simpletech that failed - it didn't kill the drive or anything, it simply started corrupting file transfers and giving errors - the files on the drive were otherwise fine, and the drive is now working perfectly as an internal drive in a spare machine (fyi, the 12V power supply that came with it also works, and is currently being used to run a bunch of old computer fans I taped together on hot summer days). I also had a lacie NAS that failed (again, the drives were fine, one is in my PC right now and the other is in the closet because I don't need it), though that had a lot of reviews noting that the PCB is prone to failure in it. (one day, it failed to start and spin up the drives - it took me 20 tries to get it to start so I could copy a few files off it that my dad hadn't backed up) As long as you buy something with good reviews and all, it shouldn't be a problem. And as I said, all of the drives I had in enclosures still work, even if a few of the cheap enclosures don't. (fyi, both the simpletech and the lacie were several years old when they failed, though they weren't on all the time).
Fyi, the Samsung drives I have (which were in the lacie nas) are from mid-2007 - yep, 5 years (and smart says they're perfect, they're working just fine), and the WD is from 2005 I think (it's IDE, so that gives you some idea - SATA wasn't new when my dad bought that one though) - 7 years, and working fine.
Also, are you saying a 5 year lifespan when on 24/7 or, say, 10 hours and a few cycles per day? (which is more typical in a PC)