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Quick question about expanding a volume with a ReadyNAS Pro 6
Dear Community, I have A Ready NAS Pro 6 3x1TB It is runnign verison 4.2.30 Wondering if I could expand and create the best redundancy as possible. I was thinking 3x4 WD Red drives - Enter...
peteophoven wrote:
I believe I cannot expand the current volume over 8 TB right?
There are two expansion limits with XRAID:
- a volume cannot grow more than 8 TiB over it's lifetime
- a volume can expand over a 16 TiB ceiling
The first limit applies here.
If you initially installed 3x1TB, then you can grow your volume to about 10 TB.
If you initially installed 1TB, and then added the other two, then you can grow your volume to about 9 TB.
If you have a 9 TB ceiling, then you can replace two of your 1 TB drives (one at a time) with 4TB models, and install the third 4 TB drive in an empty slot. You'll end up with a 9 TB volume.
If you have a 10 TB ceiling, then replace one of the 1 TB drives, and install two 4 TB drives in empty slots. You'll end up with a 10 TB volume.
Once you hit the expansion limit you need to do a factory reset to expand further. That will destroy your data, so you will need to restore it from a backup.
peteophoven wrote:
... but want to be smart about adding the drives to allow for maximum redundancy, so if two drives fail I will still be okay,
You have single redundancy now. If you want dual redundancy, then you need to have four drives of the largest size - not three.
You'd follow the guidance above to expand the volume. There is a checkbox that let's you choose to add the final drive for redundancy. You'd check that box, and install the fourth 4TB drive in an empty slot.
peteophoven wrote:
...I was thinking 3x4 WD Red drives - Enterprise.
WD Reds are good drives (I use them in my own ReadyNAS). They are NAS-purposed, acoustically quiet, run cool, and have 3 year warranties. But they are not enterprise drives.
WD Red Pros are the enterprise models. They run at 7200 rpm, so they use more power and your NAS will have higher temps. Performance will be better in some cases (in others your network limits your performance, not the drives). They have 5 year warranties.
This is a great response. Very comprehensive.
I see the advantage of a factory reset but I really have little room to be out of production.
I think adding 3x4tb drives, staged, one at a time will do the trick.
The the third for redundancy.
We started with 3x1tb giving us 1.8 as the volume size.
Will I lose capacity due to parity when adding the 4tb drives?
When I add the the third drive and indicate redundancy - will the resync cause my volume to be offline?
Thank you.
I see the advantage of a factory reset but I really have little room to be out of production.
I think adding 3x4tb drives, staged, one at a time will do the trick.
The the third for redundancy.
We started with 3x1tb giving us 1.8 as the volume size.
Will I lose capacity due to parity when adding the 4tb drives?
When I add the the third drive and indicate redundancy - will the resync cause my volume to be offline?
Thank you.
peteophoven wrote:
This is a great response. Very comprehensive.
I see the advantage of a factory reset but I really have little room to be out of production.
I can see that being an issue if you don't have enough down time (like a weekend) in which to perform it. It's just that with under 1.8TB of data, it's a lot easier to restore all that now than if you find you need to expand again after you've filled your max volume expansion. Moving to OS 6.0 lifts that limit, too. You are completely down with a factory reset and restore, even if you don't go to OS 6.x, while you are not during an expansion only.
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