In fact, the permissions are stored on the underlying disks, and read from there. So they shouldn't be changing with reboot, unless something is messing with it. So, in this case, it may be worth running a CHKDSK pass of all of the pooled drives, just to make sure. And then do this:
http://wiki.covecube.com/StableBit_DrivePool_Q5510455
This only applies to storing the database on the pool. This is because Plex uses hardlinks for it's data rather than a database. And hardlinks are not supported on the pool.
By default, new files are placed on the disk with the most available free space (absolute, not percentage). So if one of the drives is much larger, or has more data already, it will avoid using it, until all three have about the same amount of free space.
There are some balancer plugins that do change this behavior though.
Well, the pool is everything "relative to" the PoolPart folders. So the contents of the pooled drives should mirror the pool, in part, under this folder.
Though, all you'd really need to do is install StableBit DrivePool on the new system, and it will automatically rebuild the pool.
