Hi there,
ok, I want to do a demo of how to recover if you get a block corruption, and need to use dbms_repair & rowid scans to retrieve as much data as poss etc.

To do that I need to corrupt a single block in a datafile on unix, and this is where im stuck....

Anyone out there have any ideas how to do this. I have an idea I can use dd to copy the file out and then edit in Vi, and the use dd to put it back... or something - dunno. Any advice would be usefull...

ta lots, Bob