i have to upgrade storage in one of ReadyNas Pro at our company. its RNDP6000 with 6 Seagate Hdds each of 2Tb in XRaid. Please guide me about the process of replacing the Hdds. i would like to use 3tb or 4tb hdds in that.

The procedure is to do a backup, then remove one of the disks, and insert the new one with the NAS running. Wait for the resync to totally complete before moving to the second. The backup is an important step, as the RAID array has no redundancy while the expansion is in progress.There are two expansion limits - the first the NAS will not expand to more than 16 TiB. If you need more than that, you will need to do a factory reset with all storage in place, and restore the data from backup. The second limit is that the NAS will not expand a volume more than 8 TiB from the starting point. If you did your initial install with 6x2TB all in place, then you will reach the 16 TiB limit first.

Follow up questions please:I also have readynas pro rndp600 with 6 WD Blk Cav 2tb disks.If I decide to upgrade to the WD red 3tb and replace them one at a time, will I start to see the expansion right after the first drive completes?Or after the 4th?Going to the 3tb, =18tb, but after system stuff would be 16-17tb, so with the limitation discussed above, I'd end up with 16tb, which is not far off. Is that correct thinking?Thanks in advance.Steve

Are you using single or dual-redundancy?Using single you would need two disks replaced before expansion can commence. Replace one disk, wait for resync to complete then replace the next one.Using dual-redundancy four disks need to replace.As a very rough calculation (6-1)*0.9*3 < 16. So even using single-redundancy you would have to use 4TB (or greater capacity) drives to hit the 16 TiB limit.

Wow, thanks much for the prompt reply!I'm only single, but would like to go dual redundancy.Now makes me think the best bang for my buck would be a clean load of 6x4tb drives.1) back up my 9.2 tb NAS2) pull my 6 x 2tb drives out.3) put in 6 x 4tb drives and config for dual redundancy4) restore my NAS backups to the fresh installed ReadyNAS Proquestions:How much space will I have with 6 x 4tb drives with dual? and how much if I just keep it single?When do I config the dual, after adding the 4th drive?Thank you so much!

Dual would give you about 3.6 TiB less than using single.As a very rough calculation (6-2)*0.9*4 or look at the volume size calculator link in my sig.When you do a factory default with four or more disks in place you could open RAIDar and during the 10 minute countdown click setup and choose X-RAID2, tick the dual-redundancy option and confirm your choice.

Replacing 2Tb Seagate Hdd with 3/4 Tb Disks

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BotanyBay
Tutor
Nov 27, 2013
Interesting, I had not known about the 8TiB max growth limit, I did know about the 16TiB limit without a factory reset.

I started with 750GB hard drives but it may have been less than the full six. Is there any way to determine what the original configuration was? Or what the limit for the current expansion is?

I currently have
2 x 750GB Drives
2 x 2TB Drives
2 x 3TB Drives

Total size is 7853 GB (with 10GB reserved for snapshots)

If I started with 6 drives that would give a volume of about 3.75 originally so I could expand to 11.75?
If I started with 3 drives that would be a volume of about 1.5 originally so I could expand to 9.5?

Current firmware is 4.2.19 (if looking for the most stable build should I go ahead and come up to the 4.2.24? I have been looking for any issues which that build might have)

Thank you very much!

David

StephenB

Guru - Experienced User

Nov 27, 2013

BotanyBay wrote:
I started with 750GB hard drives but it may have been less than the full six. Is there any way to determine what the original configuration was? Or what the limit for the current expansion is?

BotanyBay wrote:
I started with 750GB hard drives but it may have been less than the full six. Is there any way to determine what the original configuration was? Or what the limit for the current expansion is?

It still be in the log files. I don't know of any other way to tell.

BotanyBay wrote:
If I started with 6 drives that would give a volume of about 3.75 originally so I could expand to 11.75?
If I started with 3 drives that would be a volume of about 1.5 originally so I could expand to 9.5?

BotanyBay wrote:
If I started with 6 drives that would give a volume of about 3.75 originally so I could expand to 11.75? If I started with 3 drives that would be a volume of about 1.5 originally so I could expand to 9.5?

Yes to both, keeping in mind that you are using TB, not TiB. Your current config is ~8.5 TB

BotanyBay wrote:
Current firmware is 4.2.19 (if looking for the most stable build should I go ahead and come up to the 4.2.24? I have been looking for any issues which that build might have)

I'm running 4.2.24 with no issues. There are some significant security fixes in it that you don't have.

BotanyBay
Tutor
Nov 27, 2013
Thanks Stephan!

I will go ahead and migrate to the new build at my next backup before putting in the 2tb drive to replace a 750gb drive.

Thank you for pointing out the difference in the sizes.

David

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Replacing 2Tb Seagate Hdd with 3/4 Tb Disks

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