General Preferences


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During defragmentation

Update the whole disk display every n seconds

Updating the bar along the bottom of iDefrag’s window is very processor intensive because it must scan through all of the hundreds of thousands (or even millions) of fragments on the disk in order to generate the image for the display.

On slower machines, this can actually slow defragmentation, so you may want to specify less frequent updates.

Make the display follow…

If selected, iDefrag will automatically display the region of the disk undergoing the specified type of activity. This is useful if you want to watch defragmentation in progress, but if you wish to examine other regions of the disk during defragmentation you may find it useful to disable it.

Display the top n most fragmented files

Determines how many files are displayed in the fragmented files list. Users with slower machines and/or less memory in their systems may wish to reduce this number to improve performance.

Update the statistics display every n seconds

Specifies the frequency with which iDefrag will update the statistics in the Statistics display. Again, users with slower machines may wish to reduce the frequency of these updates as a high update frequency could reduce defragmentation performance.

When finished

Play the sound…

Specifies that iDefrag should make a noise when done. You can choose a specific sound file by pressing the “Browse…” button.

Send e-mail to…

Specifies an e-mail address to which iDefrag will send a notification when defragmentation completes or is terminated due to an error.

Send the computer to sleep.

Puts the computer to sleep upon completion.

Turn the computer off.

Turns the computer off upon completion. Mac OS X should give you a period of time to cancel the shutdown.

In the block view

Use blocks n pixels square

Allows you to specify the size of the blocks in iDefrag’s main display. If the block size goes below a certain threshold, iDefrag will remove the white gaps between the blocks in order to improve the legibility of the display.

Note that reducing the block size will reduce display performance, and may slow defragmentation, particularly if the main window has been enlarged to display more of the disk.