You can't directly correlate DOA with reliability, but generally speaking Seagate and Hitachi ship more dead disks than WD and Samsung, and the ones that aren't DOA still don't live as long as WD or Samsung. I am biased because I haven't bought any Seagate or Hitachi disks in years since their respective firmware debacles...so that has only been my experience, but from customer reviews on amazon and newegg it would appear not much has changed.
Even if you assume that most happy customers don't write reviews, and that all the reviews are from bitter customers who were forced to RMA, there are simply far too many large, dead disks from Seagate or Hitachi for me to consider one, *and* their pricing is out of whack.
For instance, consider a RAID5 array fixed at $900. You can get 6 2TB Samsungs into 9.3TB (usable), or for the same money get 4 3TB Hitachis for about 8.4TB usable. When done right, the Samsungs are bigger, faster, cheaper, and inherently more reliable as the parity is higher in the Samsung array and in my opinion the build quality as well.
Even if you assume that most happy customers don't write reviews, and that all the reviews are from bitter customers who were forced to RMA, there are simply far too many large, dead disks from Seagate or Hitachi for me to consider one, *and* their pricing is out of whack.
For instance, consider a RAID5 array fixed at $900. You can get 6 2TB Samsungs into 9.3TB (usable), or for the same money get 4 3TB Hitachis for about 8.4TB usable. When done right, the Samsungs are bigger, faster, cheaper, and inherently more reliable as the parity is higher in the Samsung array and in my opinion the build quality as well.
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