HD ERR Mesg Decoding

[guy.r.berentsen]

I know this has been discussed before, and I thought I saved a copy but I 
can't seem to find it anywhere. 

Exactly what do theses HDERR messages tell me?
Is there a Bad Block in Swap that I can add to the bad block table?
(Is there a way to reformat just the swap partition?)
Or is my HD , Controller, or Power Supply starting to act up?

I started getting these messages after the machine crashed due to a power
hit in a thunder storm. My machine runs fine for 4-24 hours then crashes 
with one of these (I saved two examples to determine if it is the same block 
each time.) : 

#HDERR ST:1 EF:4 CL:FF83 CH:FF00 SN:FF06 SC:FF02 SDH:FF22 DMACNT:FFFF DCRREG:92 MCREG:CD00
#HDERR ST:1 EF:4 CL:FF83 CH:FF00 SN:FF06 SC:FF02 SDH:FF22 DMACNT:FFFF DCRREG:92 MCREG:CD00
#HDERR ST:1 EF:4 CL:FFB1 CH:FF00 SN:FF0E SC:FF02 SDH:FF22 DMACNT:FFFF DCRREG:92 MCREG:8F00
panic: hard IO err in swap

#HDERR ST:1 EF:4 CL:FF7E CH:FF00 SN:FF00 SC:FF02 SDH:FF20 DMACNT:FFFF DCRREG:F0 MCREG:8500
#HDERR ST:1 EF:4 CL:FF7E CH:FF00 SN:FF00 SC:FF02 SDH:FF20 DMACNT:FFFF DCRREG:F0 MCREG:8500
#HDERR ST:1 EF:4 CL:FFB1 CH:FF00 SN:FF0E SC:FF02 SDH:FF22 DMACNT:FFFF DCRREG:B2 MCREG:8700
panic: hard IO err in swap