changing raid type

Question

i have an old readynas rnd4000 nvx.&nbsp;i have just replaced it with a new nas and want to re-purpose the old one as a straightup backup - using raid 0.&nbsp;it is a funny configuration: 2 discs of 500bg each; and a 3rd disc of 2tb (don't ask...!).the total amount of data is 810gb. currently using x-raid.&nbsp;is there a way to move all the data onto one disc, then re-format the other two as raid 0?or is there any way to change the raid type without losing the data?&nbsp;

StephenB · Answer

unita wrote:
&nbsp;
is there a way to move all the data onto one disc, then re-format the other two as raid 0?
or is there any way to change the raid type without losing the data?
&nbsp;

No, you'll have to lose data.&nbsp; Or add another 2 TB disk to the array, which will bring you to 3TB (~2.7 TiB) volume size.

unita · Answer

hi Stephen, thanks for the speedy reply. could you please explain the significance of 3tb volume capacity in this context?cheers,s

bedlam1 · Answer

Maybe you should do a few "what if's" with this&nbsp;TOOLHover over the "capacity" for detailed info

StephenB · Answer

unita wrote:
hi Stephen, thanks for the speedy reply. could you please explain the significance of 3tb volume capacity in this context?
cheers,
s

You are wasting 1.5 TB of the 2 TB drive now, adding a second 2 TB drive would avoid that.&nbsp; It also eliminates the need for a factory reset (which would be needed if you change RAID modes).
&nbsp;
If your goal is to free up the 2 TB drive, you could switch to RAID-0 using the two 500 GB drives, by doing a factory reset and then setting the NAS to flexraid.&nbsp; There is a ~5-10 minute window after you start the reset to do that.&nbsp; You need to make that switch using RAIDar 4.3.8 (not the newer RAIDar 6).
&nbsp;
Note that if you create a single flexraid volume (RAID-0 spanning both drives), then your volume is especially fragile.&nbsp; Failure of either disk will lose all data on the NAS.&nbsp; I always recommend setting up one volume per drive instead - then if you lose a disk, you still will have the data on the other one.
&nbsp;
OR just use RAID-0 with the 2 TB drive, and retire the two 500 GB models.
&nbsp;

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changing raid type

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