same problem i found in my side. my os is sco 5.0.6
1) you start your new hdd scsi with new installed sco 5.0.6
2) find divvy command and just run it and write the tabel information
3) add your old hdd (currupt hdd) in scsi .
4) again boot with 2 hdd.
5) check again divvy command. it will show you extra table information
*** be carefull in secound you can lost your data **
do not change olddata information just give name for new mount area
eg./mnt
and save it,reboot
now if what you say your hdd is currect then you may found in /mnt

best of luck
pankaj