I have on my Ready NAS ultra 6 bay with 3 HD's of 2TB (initial install). They were installed in X-raid.Afterwards, I installed 3 extra volumes of 4 TB at different timings, the last one a few days ago.This last install didn't increased the available volume and overall volume is still limited at 9255GB while global volume of installed HD's is 18TB.I read the overall volume is limited at 14 TB. Is this correct? In this case, can I simply remove two 2 TB disks? Are there other alternatives to obtain a maximum usable storage capacity?A factory reset seems no solution for me since I have no possibility to first back-up alle data.Thanks for helping me out with this topic.Kind regards

There are 2 limits:1. An 8TiB expansion limit from the volume size at last factory default. In your case the original volume was about 3.6TiB, meaning you could expand to 11.6 TiB before hitting the limit, which is what has happened to you when you put in the 3rd 4 TB disk. 2. A 16TiB volume size limit - which can be overcome with a factory default with a volume size > 16 TiB in place.Both limits can be overcome with a factory default. You would need to backup all of the data on your volume,factory default, then restore the data.You cannot just remove 2 of the 2tb disks.I'm afraid you are going to have to factory default. You should have a backup of the data anyway.

Thanks for this feedback.Since I placed initially 3 HD's of 2TB, I suppose te volume is about 5,4TB and not 3,6TB?Can I withdraw without any risk or loss of data the last 4TB disk I installed?

3x2TB Raid 5 has 4 TB volume size = about 3.6 TiB.

I don't know if you can just remove the most recently added 4 tb disk, what does the volume page say in Frontview? Are 6 disks listed as active and part of the array?

If you remove a disk you would have a non-redundant volume.Backup, factory default (wipes all data, settings, everything) and restore data from backup is the way to go here.

volume expansion on ready NAS ultra

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mdgm-ntgr
NETGEAR Employee Retired
Oct 14, 2014
But you said you added three 4TB disks?

Have you tried a reboot?

I think adding a third 4TB disk has limited what expansion you can get.
LucDV
Aspirant
Oct 14, 2014
Yes, I've done a reboot. All 6 disks are allocated for 1858GB(2TB disks) and 3721GB (4TB disks). Global allocated stayed unchanged on 9255GB.
It seems to me that after installation of the 5th disk a volume of 11,2 TB should have been available, which was not (then also 9225TB)

I installed 3 4TB disks at different timings (months).So, after installation of the second 4 TB disk, my available should have been 11,2 TB. Which was not (9,225TB)
vandermerwe
Master
Oct 14, 2014
I'll just repeat what mdgm has already said several times. The 9.2 TiB is the correct capacity after the 2nd 4 tb disk was added.
When you add the 3rd 4tb disk the volume size is theoretically 12.8 TiB which takes you over the 8TiB limit. NO expansion takes place because of this. The Nas can't partially expand to the 11.6 limit.

You will need to factory default.

See http://ram.kossboss.com/xraid/
LucDV
Aspirant
Oct 15, 2014
OK.
Other question. Can I safely replace the three 4TB's disks then by 2TB's disks, one at the time. Must I do the replacement with power off? (In this case, I can use the 4TB disks for back-up before going to a factory default)
mdgm-ntgr
NETGEAR Employee Retired
Oct 15, 2014
To revert to smaller capacity disks a factory default would be needed.

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volume expansion on ready NAS ultra

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