this post was submitted on 30 Nov 2023
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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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[–] vegivamp@feddit.nl 47 points 11 months ago (14 children)

Quite the opposite. Use drives from as many different manufacturers as you can, especially when buying them at the same time. You want to avoid similar lifecycles and similar potential fabrication defects as much as possible, because those things increase the likelihood that they will fall close to each other - particularly with the stress of rebuilding the first one that failed.

[–] empireOfLove@lemmy.one 11 points 11 months ago (8 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.

[–] avidamoeba@lemmy.ca 5 points 11 months ago (6 children)

When using drives from the same model and batch?

[–] empireOfLove@lemmy.one 3 points 11 months ago

Yup. Same age, same design, same failures... and array rebuilds are super intense workloads that often force a lot of random reads and run the drive at 100% load for many hours.

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