[muglo] TechTool 4.x optimization/defrag

From: Leith Peterson <leithriver@xxxxxx>
To: MUGLO <muglo@xxxxxxxxxxxxx>
Date: Tue, 7 Aug 2007 12:39:26 -0400

I remember there was quite a bit of discussion on the list awhile 
back about defraggers.  In the process of trying to resolve my G4 
running 10.3.9 problems, I used TechTool Pro (TTP) 4.x to run some 
diagnostics.   It appears this version of TTP does have defragging 
built into the optimization option.

Here are some things I learned:

1.   If you run the Intermediate Test Suite, it includes a volume 
structure test that must be run before optimization.  The Basic Test 
Suite does not include this.

2.   According to the TTP manual, optimization has two goals:  "to 
defragment the files on a volume and to consolidate the free space on 
the volume into one large block."

3.   Journaled volumes, such as mine, cannot be optimized, unless I 
disable "volume journaling" in the Tools section.  I could re-enable 
after optimization, but I decided not to do this and just had my 
files optimized.

4.  There is a graph feature, that allows you to see how much 
fragmentation is present before deciding whether or not to optimize. 
There was quite a bit on my hard drive, so I decided to proceed.  The 
graph feature is only in blue and white (not the multicoloured "lava 
lamp" style version of Norton Utilities).

Things seem to be going fine since running these tests (fingers 
crossed).  I'm just telling you what appears to have worked for me, 
for your information.

I run Disk First Aid (DFA) regularly, and I'm sure it helps as well.

Leith
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[muglo] TechTool 4.x optimization/defrag

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