How to invalidate your recovery in one easy step.
As I've found this "problem" on more than one occasion I thought I'd share the details, hopefully you won't find this - but who knows.
Scenario - daily backups of databases, regular transaction log backups.
Issue - what appears to be too much free space in the ldf file, or the perception the ldf file is too large.
Solution - after database backup, backup log with truncate only and shrink the database to recapture free space.
Result - NTFS fragmentation , internal fragmentation - oh and you now can't recover your transaction log backups if an error occurs.