Hi, I think that your system has overheating problem, because you have (GB
disk inside: 
sd1 at scsibus0 targ 1 lun 0: <SEAGATE, ST39102LCSUN9.0G,0828> SCSI2 0/direct fixed
sd1: 8637MB, 4926 cyl, 27 head, 133 sec, 512 bytes/sect x 17689267 sectors
Such disk are not recommended for use inside the SS5. If you can put it in
the external enclosure it'll be much better.
regards,

--Yuri Gindin