syntonica wrote:Did somebody say defrag? It shouldn't be necessary. Since 10.3.something, basic defrag is built into the Mac OS. I wouldn't recommend it, just from all the PC horror stories, a.k.a. I just defragged my drive and now all my data is gone!
Just use a particular drive or partition for your project workspace. After you are done, back it up (lots!) and then wipe the partition. All fragmentation gone.
We all have backups, right?
If so, we don't need to depend on the utilities.
All-in-all, DP 5.12 + 10.4.10 seems as explodey as usual.

Just a point of clarification: There is a difference between basic defragmentation and disk optimization. To defrag is to simply make sure each file is stored contiguously leaving all unused space appendable at the end of the file structure. Optimization is the act of defragging with regards to platter speeds/access time and the activity level of the file. Putting the larger, most accessed files at the fastest parts of the platter, while moving the smalled less frequently used files where the head has to move farther.
And while there is a built in defrag function in OS X, it is quite specific in how it works and is pretty much useless on large files. But, Apple uses 2 technologies, Hot-File-Adaptive-Clustering & Delayed Allocation, to keep the fragmentation level low which are relevant for larger files.
Disk Optimization through defraging a drive isn't really something that is needed in this day and age of faster drives, better caching and basic HFS+ methodology (HFS+ reuses space on hard disk as a last resort, first attempting to use a new contiguous block. Apple did think of these things, they just needed the HW to catch up). In fact, performing intensive read/write operations such as defragging/optimizing will, without doubt, shorten the life of your drive.
My experience has shown that HDs that are actively defragged & optimized are the ones that exhibit shorter life spans. I, personally, do not defrag/optimize my disks. I do, however, backup often.
FWIW, Apple discourages the act of defragging/optimizing HFS+ volumes.