For those of you building a LARGE partition for your music collection, I just ran into something that was perplexing to say the least.
I took a spare 120GB drive and added it to my system as a 2nd drive setup as an F: partition formatted Primary and NTFS.
Everything was just fine. Then I started putting my 25MB average ripped songs on it. I got up to about 8GB of music but something odd happened. The folder I stored the music in clearly showed only 8GB of data but the properties for the partition showed 22GB of data being used. I kept wondering where 14GB went. I looked around. Nothing on the drive.... Grrr.
I got annoyed, moved the data off F and onto my D partition. Reformatted F and all was fine again. Started ripping more music. Got to 21GB this time when F came back saying it was using 33GB. Now 12GB was missing. Reformatted again. Again, put back all the files and everything was fine.
Started wondering what was up. I posted the experience to several storage-related forums. No one had any ideas. Posted to several newsgroups. Finally two people on one wrote back that they thought they knew what it was.
Turns out they were right. I had Windows XP's System Restore feature set to the default setting which is turned on (monitoring) and by default it takes UP TO 12% of your disk space to create System Restore space. In my case that worked out to 14GB. In the first case it used all of it and in the second it used most of it. It kept doing this apparently because of the single large files I kept hitting the drive with. I've now turned off System Restore, put on my Helmet of Shame for the day and now all seems fine again. I can't imagine that I'd need any sort of System Restore data for a partition housing only music files so I should be just fine without losing a nice feature (System Restore has now saved me twice in 2 years).
So, just in case anyone else runs into this, now you know.