Thanks for the pointer, and thanks also to yoe's reply above. But, my music collection (currently over 10,000 files) has existed for almost four years, ever since I converted the entire collection from MP3 to OGG (via a homemade script which took about a week to run).1 (I've never converted from FLAC to OGG, although I do have a couple of FLAC files.) I never noticed any corruption in the OGG files until a few months ago, shortly after I did a clean OS re-install (Slackware 13.37) on bare disks (including copying the music files)2. I'm all too eager to blame the corruption on ext4 and/or LVM, since those were the only two things that changed immediately prior to the corruption, but you both bring up a good point that maybe I should dig a little deeper into finding the root cause before I jump to conclusions.
1 I've had this collection of (legitimately acquired) songs for years prior, even having it on NTFS back in my Win2000/XP days. I abandoned Windows (including NTFS) in August 2004, and my music collection was entirely MP3 format (at 320 kbit) since I got my first 200GB hard disk. After seeing the benefits of the OGG Vorbis format, I decided to switch.
2 I have four physical disks (volumes) in which I've set up PV set spanning across all disks for fast I/O performance. I'm not totally impressed at the performance—it is somewhat faster—but that's a whole other discussion.
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