iDefrag 1.6.1

Advanced defragmentation & optimization for Mac OS X
Supports the latest HFS features, including the Hot Zone.
Both off-line and on-line defragmentation.
$30.00
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System Requirements: Mac OS X 10.3.7 - 10.4, 450MHz PowerPC or better or Intel Mac, 512MB RAM. Supports internal and external disks. To defragment your boot volume, you need to boot from a different volume (except for on-line defragmentation feature). N.B. Some G5 machines with Western Digital hard disks may experience problems due to an unresolved hardware issue.

iDefrag Features

Supports Tiger filesystems
Send email notifications or make noises when done.
Supports HFS and HFS+ (Mac OS Extended).
Supports case sensitive and journaled filesystems.
Supports adaptive hot file clustering (“Hot Zone”).
Four powerful defragmentation algorithms:
Compact data, moving all free space to one place.
Optimize filesystem metadata.
On-line defragmentation.
Defragment whilst your disk is mounted.
Advanced programmable optimization.
Rearrange your disk the way you want.
B-Tree metadata file compaction/optimization support.
High performance user-defined file classification engine.
Per-block and accurate whole disk display.
Detailed statistics so you know whether you need to optimize.
Inspector allows you to view details of individual extents/files.
Quickly jump to specific files to examine them in more detail.
Altivec accelerated display for improved performance.
Auto-update feature ensures you always have the latest version.
AppleScript support.