Hi all, first post here.
I am currently running a TrueNAS server with 3 x 4TB WD Red Plus disks in a RAIDZ1 configuration so I have 7TB of storage with parity. I have bought and added another disk to my remaining SATA port and need advice as to how I go about adding that new disk to my pool so that I increase my storage but still retain the RAIDZ1 configuration.
I understand that I can't just add the 4th drive to the same vdev without first formatting the existing 3 disks then recreating the pool with the 4 disks from scratch. Is this the case or is there any way of adding the 4th disk without backing up/erasing the existing data first? I don't mind losing my existing data and starting afresh if this is the only way but can someone please talk me through how to do this?
Also is this the most efficient way of maximising my storage with the 4 x 4TB if I want to have a one disk failure tolerance. I'm guessing it's very rare for two such disks to fail together before I can replace the faulty one. Or have I got that completely wrong?
Many thanks.
I am currently running a TrueNAS server with 3 x 4TB WD Red Plus disks in a RAIDZ1 configuration so I have 7TB of storage with parity. I have bought and added another disk to my remaining SATA port and need advice as to how I go about adding that new disk to my pool so that I increase my storage but still retain the RAIDZ1 configuration.
I understand that I can't just add the 4th drive to the same vdev without first formatting the existing 3 disks then recreating the pool with the 4 disks from scratch. Is this the case or is there any way of adding the 4th disk without backing up/erasing the existing data first? I don't mind losing my existing data and starting afresh if this is the only way but can someone please talk me through how to do this?
Also is this the most efficient way of maximising my storage with the 4 x 4TB if I want to have a one disk failure tolerance. I'm guessing it's very rare for two such disks to fail together before I can replace the faulty one. Or have I got that completely wrong?
Many thanks.