Hello guys, So, i’m having a TrueNAS server running CORE version and it was all good until a disk failed in the setup. The pool has 5 disks in RAID-Z1 and one of disk has failed which means the data is at risk. If a drive becomes faulty or starts having issues, its all toast. Yes, i know you guys w…

You keep thinking that a full copy of the data is less stressful than a re-silver. In theory, it may be less than 1% less stressful than a re-silver because a full copy does not need the read the redundant metadata, (except if the block read was bad). But, from what I know, it should not mater. Wha…

At this point, due to your past choices, every remaining option is linked to a certain amount of sizeable risk. Pick one, and hope for the best.

Another lesson to learn from this: Don’t plan or create a top-heavy NAS storage without a true independent backup. You’ll find yourself in situations where you hold your irreplaceable data in “limbo”. To try to later resilver or make a backup bumps into one or more of the following hurdles: Canno…

[image] Fastline: the pool is dead and the whole data gets lost and this is not something I want Yes. Unfortunately that’s the risk you’ve already taken. The same thing applies when trying to copy the data off. Or in fact just leaving things as they are. Your quickest, safest and simplest a…

If you can properly identify the drive that has failed, then go through the replace process. It’s simple and takes only a few hours. During which time you can still use your system. Once completed you COULD migrate the complete contents to another pool. If you’re really smart you will use an HP…

[image] dhenzler: and let TrueNAS do it’s thing with RAID. DO NOT use hardware RAID with TrueNAS. What's all the noise about HBAs, and why can't I use a RAID controller? 1) An HBA is a Host Bus Adapter. This is a controller that allows SAS and SATA devices to be attached to, an…

I agree. All in all this is the easiest safest option. I have done it before with a raidz1 and nothing was lost. And ZFS DOES tell you if a file is lost, and you can restore that one file separately. I would simply replace this disk. This is what raid systems are designed for after all.

Backup the most critical data NOW. Then replace the failed drive and resilver ASAP! Then add a second (and third) parity drive and do a proper backup of at least the important data. My thinking is that doing a re-silver will do the same stress as reading data off and backing it up elsewhere, but …

[image] Arwen: You keep thinking that a full copy of the data is less stressful than a re-silver. In theory, it may be less than 1% less stressful than a re-silver because a full copy does not need the read the redundant metadata, (except if the block read was bad). But, from what I know, it sho…

Disks and VDEV

TrueNAS General

Davvo January 2, 2025, 9:39am 13

DO NOT use hardware RAID with TrueNAS.

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Disks and VDEV

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