in reply to Combining Ultra-Dynamic Files to Avoid Clustering (Ideas?)

From what I remember about the "bad old days" when disks were smaller, the block size isn't a static 4 Kb. It depends on the size of the disk that you're using. You could try partitioning the disk that you have into 2 (or more) smaller partitions. This could reduce the block size on each individual partition, thus reducing waste overall.