getswapspacefailed <-- OUCH ! Help?

[keith at smmc.qld.edu.au]

Hi all, I have a mail server which I setup (4.7) late last year.
iT often starts to crap out with getswapspace failed errors.
a) How can I check how much swapspace I had allocated.
b) How can I check if the drive has a bad block on the swap slice
c) How can I fix the problem
Sorry for being a dummy here but an not a FBSD guru
Keith
Thanks in adv