Refurb enterprise server drives seem to be a commodity, with 4TB between $50 and $60 on ebay, with maybe most important issue getting a good vendor, then picking the right model drive. Both of these drives looks like the vendor is good, 23k 100% positive feedback, and are priced the same $60 each, but ...
HGST Ultrastar 7K4000 HUS724040ALA640 4TB 7200RPM 64MB Cache SATA 6.0Gb/s 3.5" Enterprise Hard Drive - 2 Year Warranty
HGST Ultrastar 7K4000 HUS724040ALE641 4TB 64MB Cache 7200RPM SATA 6.0Gb/s 3.5" Internal Enterprise Hard Drive - 3 Year Warranty
Which is best, are there better or worse?
Since these would go in a NAS, potentially Raid5 (spare me the URE lecture, had it already) one concern I have is replacing a failed drive later on with same model and finding the supply exhausted or legacy priced. If its not an issue I might just buy 2x at a time expanding storage and mirror as needed, if not then I'd consider buying 4x or more now.
HGST Ultrastar 7K4000 HUS724040ALA640 4TB 7200RPM 64MB Cache SATA 6.0Gb/s 3.5" Enterprise Hard Drive - 2 Year Warranty
HGST Ultrastar 7K4000 HUS724040ALE641 4TB 64MB Cache 7200RPM SATA 6.0Gb/s 3.5" Internal Enterprise Hard Drive - 3 Year Warranty
Which is best, are there better or worse?
Since these would go in a NAS, potentially Raid5 (spare me the URE lecture, had it already) one concern I have is replacing a failed drive later on with same model and finding the supply exhausted or legacy priced. If its not an issue I might just buy 2x at a time expanding storage and mirror as needed, if not then I'd consider buying 4x or more now.
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