XBOX

http://www.xbox-linux.org/wiki/Mounting_FATX_partitions_HOWTO
http://www.x-dsl.org/wiki/Partitioning

Since I just recently filled my XBOX HD (160 gigs) and I've copied over lots of files: emulators, movies etc. I've thought about defragging it. I'm not sure if the linux distros that have been ported allow the xbox to be defragged. I tried Googling for utilities and information:

Groovy Web Has some information on emulators and a link to a defragger but I don't trust it.
TechSupportForum.com I think is complete BS as the XBOX HD uses FATX.
XboxAddict.comMust be referencing the same article above.
Xbox-Emulation.co.uk States that defragging isn't needed due to how the drive is partitioned.

I'll do some more digging later. As far as I know it does NOT defrag on the fly and I haven't found any apps that do it yet. The only way I can really see improving a fragmented drive is to wipe it. Not really practical but I do know that Microsoft has a disc that is available that "refreshes" the XBOX.

Update 4/08/07
Update 3/31/08

Since several souls have come across this blog searching for xbox defrag information I figured I would revisit the topic. To date there is no public tool if one exists. A group began but never completed a working defragger.

An explanation of how fragmentation occurs can be found here. Take some of the responses with a grain of salt. Team Aavalaunch was said to have begun work on an xbox defragmenter however it was never completed. An interview with Team Avalaunch that mentions a defragger can be found here. A news post containing updates on the progress of the xbox defragger by Team Avalaunch. If you don't feel like visiting the site I have included the most interesting portion of it below. This was posted on June 1 2003:

The defrag class is already made and it has loaded all the info it needs. Now we just gotta make sure noone looses all info on their drives hehehehe

And yea.... don't expect this feature in 0.46, we're wanting 0.46 out now - so new features is pushed a bit back. But for 0.47 this will be a high priority, now that we see how things are set up.

Avalaunch Dashboard info can be found here (wiki).

If your xbox hd is fragmented and noticably performing slower the only method available to you is to copy all the files off of the xbox hd and copy them back over.

Information on the structure of FATX (the filesystem that the Xbox HDs use) can be found here. FATX Support in Linux limited to kernel 2.4 (which is unmaintained) and is not present in 2.6.

While troubleshooting what I thought were DNS related issues I found out some great info about Xbox Media Center.

I have always had problems with clock loops and the system defaulting to July 3 2003. Upon review I noticed I had set the gateway incorrectly 192.168.1.100 instead of 192.168.0.100. Which would explain why in the Evox it would fark up but display correcty with XBMC.

I began reviewing my network settings inside XBMC and decided to try using my own nameserver. Everything worked fine I rebooted and used the Evox dash to copy over a few more files and I filled up the HD. XBMC would start up just fine then freeze after a few seconds. I changed the logging output to Debug to see all messages however it wasn't halting after it setup the network. It seemed "idle" even with the network turned off and RSS feeds off.

I decided that it must've been the network settings (DNS I switched from my ISP to my own) I changed however these cannot be changed in the XboxMediaCenter.xml. After some Googling I found out that settings.xml inside of the E:\TDATA\0face008 folder contains the actual meat that XBMC uses.

I didn't review the entire file just the Network portion. Importantly the Assignment option defaults to 0 which pulls over information from the dashboard. Assignment 1 is DHCP and Assignment 2 is Manual (allowing the following Gateway and DNS to be read and set).

Long story short, to make adjustments look in the E:\TDATA\0face008\settings.xml file.