June 10, 20206 yr I have bought two new drives and am planning to replace two older drives, but was there any way to decided what the drives I should replace. All drives are heathy. Some have UDMA errors but that was a bad sata cable :(. Should I just choose the oldest drive, or is there a better metric to go by.
June 10, 20206 yr All hard drives will fail. That is about the only thing that can be said that is absolutely true. If there isn't some indicator that a drive has problems, then there is no way to predict which one will fail next. (Especially, in a very small population...) What I would do to pick one to change. (my personal first choice would be the slowest one. If they are all about equal from that standpoint, I would probably go with the oldest-- particularly if they have more than 40,000 hours on them.) Set the removed drives on the shelf in storage in case you need to replace a failed drive (assuming there are other drives that are equal in size) in the array. That way, you have 'replaced' the next drive to fail with a new, larger drive. 😏
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