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Best use of extra HDDs (discuss.tchncs.de)

submitted 10 months ago by [email protected] to c/[email protected]

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Hey guys, I'm setting up my NAS (openmediavault) and very much enjoying it! It now runs my Nextcloud and a couple of services. I got a mirror ZFS setup of two 8TB drives.

I got another two 8TB drives and am doubting whether I should add them as an extra mirror vdev, or create a new pool for extra backup. I'm not sure if that extra backup is necessary though, since I got a cloud backup already every day. My drives are only used 14% so I'm not even sure if I should already put them in the pool. What do you guys think?

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[–] [email protected] 2 points 10 months ago (1 children)

Raid5 of three disks and keep the fourth as cold spare. That's 16TB instead of 24, but you're barely using your current 8, so a spare makes more sense.

[–] [email protected] 1 points 10 months ago

Hmm I think RAID5 would be risky. If I have a 16TB array and then get a failure, resilvering would take long and that could bring a second disk down..