this post was submitted on 21 Aug 2023
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Replacing drive with a larger drive in zfs (lemm.ee)
submitted 1 year ago* (last edited 1 year ago) by MostlyGibberish@lemm.ee to c/selfhosted@lemmy.world
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Hi all!

I'm in the process of migrating my home server from Unraid to TrueNAS with a ZFS pool, as well as upping storage from 2 6TB drives to 4. Unfortunately, because of either my bad luck or incompetence, it seems like one of the drives has died. So, here's my question. I've read up a bit on resilvering and I know that if I replace the dead drive with a larger drive, the pool will be unable to use that extra space until the remaining drives are upgraded, but would there be any other drawbacks? Especially if the pool was left running in this configuration for an extended period.

I definitely see myself upgrading the pool to larger drives in the future, and it would be nice to save myself buying an extra drive that may end up getting replaced before the end of its life. (Note: I'm aware that resilvering isn't the safest way of upgrading a pool, but the data on the pool is either backed up or non-essential, so I'm fine with the risks)

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[–] walden@sub.wetshaving.social 2 points 1 year ago

I have mismatched drives. Mostly 8TB, and 2 10TB. The 10TB are simply wasted money, but no other downsides.