option
 

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Re: options for file deletion/erasure and/or partial wiping
 

full re-flash (fiasco images + eMMC) will wipe out your device clean....

Re: options for file deletion/erasure and/or partial wiping
 

Eh, it's not in the repo's. It's a program you run on your computer while having your N900 connected through USB, called flasher-3.5.

Read up on reflashing here.
http://wiki.maemo.org/Updating_the_tablet_firmware

And please, learn to / use search, if you don't want to seem ignorant
http://talk.maemo.org/msearch.php