This is no answer to the question, although it may be of interest:There is an on-going discussion on the linux kernel mailing list about speeding up fsck for ext3, see, e.g.
http://lkml.org/lkml/2008/1/13/3 -- Regards, Jörg-Volker. --To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]