Initio I/O HIGHWAY - Manual (Page 57)

53
initio
®
Troubleshooting
Drives with Multiple Operating Systems
It is mandatory that the same head mapping be used across multiple operating systems
on one drive. However you can use different head mappings on different drives with the
exception of SCO UNIX. It is recommended that you enable “DOS Space > 1GB” option
if the capacity of your SCSI hard disk has more than 1 GByte.