Expanding a Raid 1 with larger drives

[Super.Hyphenated]

Hey All.

I would like to upgrade my RAID-1 mirror I have in my freenas system that contains 2x 1TB GB hard drives for 2 larger hard drives. Possibly upgrading to 2 x 6TB or 2 x 4TB in a Raid 1.

How would I go about doing this?

I have had a look at the manual and found this:
Most I have looked at: http://doc.freenas.org/9.3/freenas_storage.html#replacing-drives-to-grow-a-zfs-pool

Is this the easiest method? Also, anyone have a simple guide in document format or a video tutorial?

Thanks.

 

[danb35]

Yes, that section of the manual is the best answer. I don't know how it could be further simplified. Edit: Were there parts you found confusing, or wanted clarification on?

 

[jgreco]

We encourage people to use the term "mirror" rather than "RAID1" as "RAID1" isn't ZFS terminology and may even be mistaken for RAIDZ1.

@danb35 's answer is correct, but I will point out that for the specific case of a mirror, ZFS allows the addition of new devices to a mirror, making a three-way (or even four-way) mirror. You can add the larger hard drive as an additional mirror of/in the existing vdev. This is extra work, but if the data is particularly valuable it might be worth it.

 

[Ericloewe]

Also: Note that you should use the manual for your version of FreeNAS. If you're using FreeNAS 9.10, use the link at the top of the page:
http://doc.freenas.org/9.10/

 

[Stux]

And you could expand by adding a mirrored pair to your existing mirrored pair.

If your case supports 4 drives, I'd consider this option.

In the future (or when one fails) you replace the 1TB drive with still bigger drives.