Unfortunately no one can be told what fun_plug is - you have to see it for yourself.
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I have gradually upgraded over the years, started out with the DNS323 and then went to the DNS325. On both of them I could use rsync and back up everything up from Volume 1 to Volume 2. I could take out volume 1 and put in volume 2 and it would become volume 1 and life was good. This is how I kept everything updated and backed up. If I crashed a hard drive I had a backup of all the data.
Now comes along my lasted addition, I got a DNS345 (yes, it's not a DNS343 but perhaps the 343 and the 345 have similar issues and so far I can't find a forum for the 345). I can't take the drives from the 325 and put in the 345 or the other way around. This of course is not ideal but OK, I can live with it. Now comes the other problem, on the DNS345 I can't take volume 2 out and put it in volume 1's slot and have a good backup for volume 1. To recover from a failure I would have to have another drive, format it, reinstall funplug, then rsync back from volume 2 to volume 1 to recover.
So my question is, how does one rename the volumes such that the Volume 2 can become Volume 1? Anyone know of a way to get the DNS 325 to see drives from the 345 and vice-versa?
Is it just a matter of unmounting the drive and remounting it, or is this really going to mess things up.
I have not tried that.
I would think asking here is ok -- the 345 looks like the upgraded 343 anyway.