Submitted 1 week ago by merthyr1831@lemmy.ml to selfhosted@lemmy.world
How is the drive management in OMV? I’m looking for something similar to UnRaid pools so i can add one drive at a time (ZFS makes you add vdevs of the same no. of drives).
I’m not too concerned with parity (ive got automated remote backups for sensitive info that I cant replace) but it would be good to know if I could swap drives out if I need to expand or replace anything too.
I don’t use OMV but I do use MergerFS + SnapRAID. Works great so far.
I played a bit with SnapRAID but realized there is too many ways to lose data with it; especially if you do periodic parity sync. Otherwise, it works fine.
MerferFS works properly as far I tested it.
You may encounter some confusing errors with MergerFS; depending on your config, any software using SQLite may crash with a scary-sounding “disk I/O error”. The quickstart has more info, trapexit.github.io/mergerfs/quickstart/
Yes, don’t put any database on it
BCsven@lemmy.ca 1 week ago
What ZFS are you using?
“As of November 2023, this feature was merged in main and is scheduled for release in OpenZFS 2.3:”
'The OpenZFS project (ZFS on Linux, ZFS on FreeBSD) is working on a feature to allow the addition of new physical devices to existing RAID-Z vdevs. This will allow, for instance, the expansion of a 6-drive RAID-Z2 vdev into a 7-drive RAID-Z2 vdev. This will happen while the filesystem is online, and will be repeatable once the expansion is complete (e.g., 7-drive vdev → 8-drive vdev)."
MalReynolds@slrpnk.net 1 week ago
The old adage is never use v x.0 of anything, which I’d expect to go double for data integrity. Is there any particular reason ZFS gets a pass here (speaking as someone who really wants this feature). TrueNAS isn’t merging it for a couple of months yet, I believe.
merthyr1831@lemmy.ml 1 week ago
2.3 counts as x.0? I’m not aware of their semantic versioning.
ah yeah it’s basically the first release supporting it. ah well, maybe i migrate later (i technically wont need it for a year or two with my projected data usage)
merthyr1831@lemmy.ml 1 week ago
None yet. But comparisons ive seen (such as snapraid’s website) suggested it was a limitation, but they could be quite old, still.
BCsven@lemmy.ca 1 week ago
Not sure on MergerFS…I haven’t gotten deep into ZFS pools.