TrueNAS HardDrive Upgrade

[Just_Lexx]

i would like to upgrade to 4 4Tb hard drives but I have 2 mirrored vdevs is there any way to change that without losing data

 

[Ericloewe]

You have to be a lot clearer. What do you want to change about your pool's layout? Do you want to replace the two 2 TB disks? Do you want to change the structure of the pool?

 

[Just_Lexx]

You have to be a lot clearer. What do you want to change about your pool's layout? Do you want to replace the two 2 TB disks? Do you want to change the structure of the pool?

i want to make it so its just 1 vdev that's raidz with 4x 4tb hdd

 

[Ericloewe]

You'd have to destroy the pool, moving the data elsewhere temporarily.

 

[WI_Hedgehog]

You'd have to destroy the pool, moving the data elsewhere temporarily.

Why not add the 4 new drives to the system, create a new pool, transfer the data, remove the old pool, rename the new pool?

Worst case is do a scrub to make sure the data is in good shape, detach and remove the pool physically, put the new drives in and build a new pool, detach 2 drives, add two drives from the old pool and reattach, copy the data. Then detach the two old drives, reattach the 2 new sidelined drives and the pool rebuilds. Totally doable in my book.

 

[Ericloewe]

Why not add the 4 new drives to the system, create a new pool, transfer the data, remove the old pool, rename the new pool?

Same concept, but it requires four new disks instead of two.

 

[WI_Hedgehog]

Same concept, but it requires four new disks instead of two.

That's true. There are other ways to do this with imply adding 2 drives but it's risky.

Hard drives are like cars, they don't last forever though we wish they would, and it's good to have a spare on hand in case one breaks. I'd want to have a spare or two if possible given that the size of the drives hints the drives are older.

Backups...I always wonder if users have backups and verify they're good.