Forum Discussion

Tutor

Jul 22, 2015

ReadyNAS NV+ V2 & Seagate 4TB ST4000VN000 HDDs

Hi, I have a ReadyNAS NV+ V2 installed with 2 x 2TB and 2 x 3TB HDDs from the Netgear HCL. I want to increase the capacity by replacing the 2x 2TB HDDs with 2 x 4TB HDDs. Does anyone know if ...

Adding Disks

StephenB

Guru - Experienced User

Jul 28, 2015

smithy50 wrote:

My reluctance to use the WD40EFRX drives is because of their reported Load Cycle Count issue. It's not clear to me if this is still an issue on new WD40EFRX drives.

It's not, and if you end up with one of the few units where it was a problem you can fix it (as noted above).

smithy50

Tutor

Jul 28, 2015

StephenB & Vandermerwe,

Thank you both for your positive responses. My only reluctance to using the WD40EFRX drives was the LCC issue, so if that's resolved on the current new drives then these would be my preferred upgrade route.

I've read somewhere that any volume capacity increase is limited to a percentage of the current volume capacity. My main ReadyNAS NV+ V2 (running 5.3.11) has 2 x 2TB WD20EARX drives and 2 x 3TB ST3000DM001 drives installed and configured as X-RAID2. My intention was to upgrade the two existing 2TB WD20EARX drives with two new 4TB drives (most probably now WD40EFRX drives). Does that scenario fall within any volume capacity increase limit?

Your help is much appreciated.

Thanks

vandermerwe
Master
Jul 28, 2015
http://ram.kossboss.com/xraid/

Above is is a good raid volume size calculator.

The incremental expansion limit is 8tb from the volume size at last factory default. For example if you set up your nas with a 2 TB volume you would be be able to expand to 10 TB before hitting the limit. Overcoming the limit requires a factory default.
The limit exists on 4.2.x and 5.3.x, not on OS6.

In your case you need to know why your sorting volume size was, then use the calculator to see what you projected volume size will be, and whether it exceeds the sorting volume by more than 8 TB. I think unless your sorting volume was under 1.5 TB then you will be OK. Use the calculator for a more precise calculation though.

There is a 16 TB total volume size limit on volumes on the same OSs. A factory default with this size volume in place overcomes this limit too, as long as the volume can be set up in one phase.
- StephenB
  Guru - Experienced User
  Jul 28, 2015
  If you started with 2x2TB, then 2x4+2x3 would give you an 10 TB volume (~9 TiB). 8 TB of growth (7.4 TiB)
  
  So that should work (the growth limit is 8 TiB, not 8 TB).