TrueNAS 12: Replacing Failed Drives

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FreeNAS ZFS VDEV Pool Design Explained: RAIDZ RAIDZ2 RAIDZ3 Capacity, Integrity, and Performance.

How to Build & Extend FreeNAS ZFS Pools with VDEVs / Adding Drives to an Existing FreeNAS

LAWRENCESYSTEMS

Worth noting: if you replace all disks progressively with larger disks, you can expand the array to the extra space once the array is stable on the larger disks.

ZiggyTheHamster

Thanks TOM. Keep up with the TrueNAS 12 Core Video Series! We the community TRULY appreciate it.

JuanLopez-dbcc

whenever I have an issue with TrueNas I can always find what I need with Lawrence Systems YouTube videos... Thank Tom!

davsyl

Thomas Lawrence helping out the TrueNAS Community one video at a time!

TrueNAS

Also worth noting (for future readers) is that if you originally imported your ZFS pool from a non-Truenas/Freenas system and you are replacing like for like you may need to do the drive replacement manually from the shell. The reason is the GUI "replace drive" code always creates a swap partition on the first few drives and then tries to create a ZFS data partition. If your pool was created on another system it probably wont have these swap partitons, so if you are replacing a failed drive with the same sized drive it will abort with "not enough space" after creating the swap.

Gaspode_

I know this is a fairly old video - but you helped me recover a ZFS2 array out of a failed system *with* a bad drive out of the 4 - and now it's recovering because I knew that the "unavailable" drive (which was no longer installed) had to be "replace" with the new one installed in it's place. Top job!

jburnash

Tom, I really enjoy your videos on TrueNAS. You might tell users to label the back of their drives with the serial number. As a hobbyist who's used TrueNAS a long time, this is essential if you mount the drives close together!

kulinskit

Maybe I missed it, but I didn't hear you mention that you can replace the drives in a vdev by larger ones if you do it one-by-one. After that, you can easily extend the filesystem. This solves some problems for people with no spare SATA ports that need to upgrade their storage capacity.

marijnblom

Useful thanks! FreeNAS box failed with Seagate Ironwolf 4TB. While waiting for a replacement, a second disc had issues! Rebuilding the first disc quickly before replacing a second! Thanks!

mgeo

wow, this is much more simple than I thought it would be

ayden

Thank you for your videos. I am a complete Noob working with TrueNAS, I had one of my HD power connector caught on fire. It was a cheap power connector. I have never had on in the past 30 years do this however, there is a first for everything. So the fire damaged the drive and had to be replaced. You made it very easy for me to replace the disk, and get back online. Thanks

RobCobbW

These kind of videos are really useful, even if the process is pretty straightforward. Taking the edge off the panic ;)

Crackalacking_Z

Nice informative tutorial. To echo what others have said here, thank you, and please keep this really invaluable series alive.

FrankieRockett

Thanks Tom I'm new to truenas, My experimental HP N54L system indicated a problem and after a bit of head scratching, kludging my way through to find the failing drive I couldn't work out how to replace the pool drive. This explanation really worked for me much appreciated, onwards and upwards.

Arachnoid_of_the_underverse