RN2120 6.4.0 upgrade 4 1TB drives to 4 3TB drives

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sjf1 wrote:

 

7) Immediately thereafter, "Resyncing started for Volume Data". This WAS a surprise -- a second resync cycle?

 

  

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XRAID creates RAID layers.  The first resync was to restore the 1 TB layer you already had.  The vertical expansion creates a second 2 TB layer, which is merged into the virtual disk.  That needs its own sync/creation, and I think that is what you are seing here.

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sjf1 wrote:

 

 

9) Repeat steps 4-8 on slot 3 (second resync takes about 18 hours!)

 

 

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Resync requires either reading from or writing to every disk sector in the volume.  So the larger the volume is, the longer it takes. And of course the upper 2 TB layer will take longer than the base 1 TB layer.  Another factor is that disk reads/writes are faster at the beginning of the disk, and slows as you move towards the end.

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sjf1 wrote:

 

Current status on the System Overview screen shows "Healthy", not "Redundant"

Volumes page shows all 4 3TB drives as green, and online, Performance page shows all green.

There was no increase in space for the 4th drive, still at 6.25TB.

 

Not sure where to go from here. Any help would be appreciated.

  

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Probably best to contact support - perhaps wait a little bit, and see if someone from Netgear offers to look at the logs.  

You could also try rebooting the NAS, and/or look in rn_expand.log, mdstat.log and smart_history.log yourself. 

There are some issues with ARM platforms that are fixed in 6.4.2-RC1, so trying that might help. I'd wait for log analysis/support help before trying that step though.