Buy Diskwarrior. If you have only one disk utility, that's the one to own. fsck and Disk Utility are only useful for small problems. John Griffin <jwegriffin at mac.com> writes: > While we are on the subject of TTP4, every time I run Cocktail and > restart, > I get a message from TTP4 that I have an "allocation overlap" error. > However > when I run fsck I am told my startup volume is OK. > > Any thoughts on this one?