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How To Determine Which Hard Drive Failed?

Hello,

I have 10 hard drives, most of which have similar model numbers or makes. In preparation for one dies, how will I know which one is failing (or failed)? What I need to avoid is pulling a working hard drive from the ZFS1 set up and have the RAID be unrescueable.

I have SMART alerts set up with daily alerts letting me know the health of the drives/system but if one of them did go down I wouldn't be able to determine which one did based on that information.

Thank you in advance for...

How To Determine Which Hard Drive Failed?

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