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Can I use two different drives? (lemmy.world)
submitted 2 years ago by to c/selfhosted@lemmy.world
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I am building a NAS in RAID 1 (Mirror) mode. Should I buy 2 of the same drive from the same manufacturer? or does it not matter so much?

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[–] 11 points 2 years ago (2 children)

If I had a dollar for every time rebuilding a RAID array after one failed drive caused a second drive failure in the array in less than 24 hours.... I'd probably buy groceries for a week.

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  • [–] 5 points 2 years ago (2 children)

    When using drives from the same model and batch?

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  • [–] 2 points 2 years ago (1 child)

    I've heard just in general. The resilvering process is hard on all the remaining drives for an extended period of time.

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  • [–] 0 points 2 years ago (1 child)

    So you're saying I should be running RAIDz2 instead of RAIDz1? You're probably right. 😂

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  • [–] 2 points 2 years ago (1 child)

    I made that switch a few years ago for that reason.

    That said, as the saying goes, RAID is not a backup, it should never be the thing that stands between you having and losing all your data. RAID is effectively just one really dependable hard drive, but it's still a single point of failure.

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  • [–] 1 point 2 years ago

    I don't know if you're talking about the sample of cases you've personally witnessed, or the population of all NASes in the world. If the former, that sounds significant. If the latter, it sounds like it's probably not something to worry about.

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