[kwlug-disc] TrueNAS scale (4-5 drive configuration)

[John Van Ostrand]

I've been quite happy with OpenMediaVault on a Raspi 4, which I use mainly
for daily backup, but also a little for streaming. I switched about three
years ago after deciding to retire the very old WD My Book (after replacing
the drive twice.) I've been using simple filesystems for all my data, and
using rsnapshot to backup onto OMV every night. I use smartmon to alert me
about HDD errors figuring I can replace early if needed.

It may seem unwise to some, but I chose not to go with RAID because
downtime doesn't cost me much and I figure I could be back up on a new
drive in the main server in less than a day for the important things and
another day for the sundries. So rather than put money and time in up
front, my gamble of doing it later has worked out well so far.

On Mon, Sep 23, 2024 at 11:21 AM Doug Moen <doug at moens.org> wrote:

> > This functionality is reportedly "coming soon", ...
>
> Wow, I didn't realize that RAIDZ Expansion is *still* coming soon.
> * In June 2021, Ars Technica announced that "Matthew Ahrens opened a pull
> request last week" and that "RAIDz expansion will be a thing very soon".
> * In November 2023, Phoronix announced that the PR was merged into master.
> <https://github.com/openzfs/zfs/pull/15022>
>
> More discussion in <https://github.com/openzfs/zfs/discussions/15232>
> * Sep 8 2024: Yes, special thank you to everybody on the OpenZFS side who
> helped get this one over the finish line. We've got this in our TrueNAS
> 24.10 BETA1 release already for testing, anticipating updating to OpenZFS
> 2.3 as soon as it is tagged.
>
> So we can update the ETA to Very Soon.
>
> From Chris Irwin,
> > I'm using 4x 8TB CMR NAS drives, and went for RAIDz1, which is kinda
> > like ZFS's version of RAID5 -- so n-1 drives worth of storage.
> >
> > That gives me 21.01TiB (8TB drives actually 7.28 TiB) of storage.
>
> I read something concerning in the final discussion page I linked to.
> @yorickdowne said
> > Raidz1 with larger drives has a tendency to break during resilver.
> > With 14TB disks raidz-1 is risky when rebuilding. I recommend you do a
> 4-wide raidz2, which you can then expand later if desired.
>
> _______________________________________________
> kwlug-disc mailing list
> To unsubscribe, send an email to kwlug-disc-leave at kwlug.org
> with the subject "unsubscribe", or email
> kwlug-disc-owner at kwlug.org to contact a human being.
>


-- 
John Van Ostrand
At large on sabbatical
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.kwlug.org/pipermail/kwlug-disc_kwlug.org/attachments/20240923/075a988b/attachment.htm>