Migrating from QNAP to TrueNAS - Raid Q

TrueNAS General
1

Hello,

I’m migrating from a mirrored 2 drive 6tb Qnap to a TrueNas system with 2 new 12tb drives in. What I think I need to do is to create a pool with a mirrored pair (2x 12tb HDD) and then copy over the contents from the Qnap. After that, I’d like to incorporated the two 6tb drives into the truenas system. How would I do this? Can I add these two drives later to my new truenas RAID 1 to make raid 10? Would my total capacity be 18TB or would it be reduced to 6tb?

I hope that makes some sort of sense. Sorry, relatively new to this…

2

The truenas term for raid1 is a zfs mirror, but yes you can create a mirror using the 12 TB drives, copy the data over and then add the 2 6tb drives as a second mirror pair. you can then later replace the 6tb driveswth 12 tb drives. After both drives are replaces the pool will increase to 24tb max available space.

3

Thanks. I’ll probably keep the 2x 6tb drives as a redundancy location for my photos in the RAID 10 config. I appreciate RAID is not a backup - I have an offline drive for that too.

4

I’m not sure what you mean with keeping the 2x 6TB drives as a redundancy location for your photos. Is the redundancy to a PC or were you thinking it would have a copy of data from your first 2x 12TB pool & VDEV?
I think you need to go over the ZFS primer and drive layout and use the ZFS terms so everyone is talking about the same setup.

BASICS

TrueNAS Systems pool layout whitepaper

5

Thank you. Those links were very helpful. I’m going to create a new vdev under the same pool with the 6tb drives and keep a copy of the data.

6

I do not believe they could add 2 x 6TB drives to a 2 x 12TB existing pool because of the smaller drive size…..

7

it’s possible since it’s a different vdev

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