Just loaded up the ReadyNAS PRO 4.2.20 firmware and then installed LMS 7.7.2

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Discovering files/directories: /media/Music (44968 of 44968) Complete 00:00:15

Scanning new music files: /media/Music (40702 of 40702) Complete 00:21:05

Discovering playlists: /media/Music/Playlists (1 of 1) Complete 00:00:00

Pre-caching Artwork (2950 of 2950) Complete 00:02:47

The server has finished scanning your media library.
Total Time: 00:24:07 (Tuesday, May 1, 2012 / 11:24 AM)

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It was taking 45 minutes with 4.2.19 firmware and SMS 7.6.2!

Jim