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Forum Discussion
Xraid2 dual redundant vs FlexRaid 6?
What's the pro's and con's of each? They both seems to be identical if Dual redundant is selected.
There's no downside to using xraid2 dual redundancy in OS4, and generally I recommend xraid2 unless there's a reason not to.
There are two phases to building a volume with mixed disks. You can visualize it as building a layer cake.
The first phase is to build a layer across all the drives, using the size of the smallest. In your case that would be 6x1TB RAID-6. That would give you 4 TB of storage.
The second phase is "vertical expansion" - adding a second layer across the larger size drives using the remaining space. That would be a 4x1TB layer in your case, and should have added the additional 2nd 2 TB.
Based on your info, it appears that the vertical expansion step simply didn't start. In particular, that is why you are seeing 927GB allocated on all drives.
My advice is to do another factory default with xraid2. If the second phase doesn't seem to start, then simply reboot the NAS. Sometimes 2 or three reboots seem to be needed.
If that doesn't work, contact support at support.netgear.com and followup on this thread.
Flipping out often leads to bad results with a NAS. :wink:
dannieboiz wrote: I had another thread asking this question but deleted it and merge it here since they're related.
I have 2x 1Tb and 4x 2Tb configured it to a Flex Raid 6 and it's only seeing 4Tb. I thought Flex Raid 6 is supposed to give me 6 TB with 2 drives redundant?
So I flipped out and reset the NAS and configured FlexRaid dual redundant and I'm still seeing 47 GB (1%) of 3683 GB used which tells me I still only have 4Tb. Do I have to wait until all the resync is done? There are no data on any drives at the moment and all drives were in place after the factory reset.
All 6 drives is showing 927 GB allocated only while 4 of the drives are actually 2Tb. So what does it mean when it says "allocated"? If it means usable storage then I should have 6Tb once complete?
There are two phases to building a volume with mixed disks. You can visualize it as building a layer cake.
The first phase is to build a layer across all the drives, using the size of the smallest. In your case that would be 6x1TB RAID-6. That would give you 4 TB of storage.
The second phase is "vertical expansion" - adding a second layer across the larger size drives using the remaining space. That would be a 4x1TB layer in your case, and should have added the additional 2nd 2 TB.
Based on your info, it appears that the vertical expansion step simply didn't start. In particular, that is why you are seeing 927GB allocated on all drives.
My advice is to do another factory default with xraid2. If the second phase doesn't seem to start, then simply reboot the NAS. Sometimes 2 or three reboots seem to be needed.
If that doesn't work, contact support at support.netgear.com and followup on this thread.
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