> it only crashed OWB due to notorious Javascript memory eating bug, > I simply quitted it and RAM was almost completely freed.
It was not a crash then.
> Did OWB leave some temporary files open on the hard disk after memory crash, > despite the fact it was correctly closed clicking "QUIT" on its death pop-up > window? Not closing all files when quitting thru death or meditation window.
Not closing files cannot result in filesystem corruption as long as there has been no disrupted write access.
> It is better to [...] check carefully if big drives can be installed into MacMini.
