Missing albums

[spaceryder]

My set up is: CDs ripped on a MacBook Pro using dBpoweramp; music stored on a Synology 214j; MinimServer on NAS; MiniServer on MacBook; ethernet connection to a NAIM Atom controlled by their app.

Finally got it working with advice from this forum and was happy as Larry.

I've been ripping loads of CDs but I've found that some aren't showing on MinimServer. The really odd thing is that I'm missing all the albums from some groups, eg Pink Floyd but can see other groups.

On the other hand, I can't see seven out of ten albums of a Beethoven box set, for example.

And whilst I'm at it can't get all the album covers despite the fact they're all in in their respective folders.

I have rescanned from my MacBook and am now out of ideas.

Would really value any help.

Thanks