ESATA on SCO UNIX OpenServer 5.0.7

Has anyone here used eSATA drives on SCO UNIX OpenServer 5.0.7? SCSI host adapters and drives are getting harder to find, so I'm thinking about eventually switching to eSATA, but only, of course, if they will work with OpenServer.

The last paragraph Which Intel Chipsets "SATA-AHCI" does the SCO UnixWare 7.1.3 / 7.1.4 and OpenServer 6.0.0 "ahci" driver support?
How large are the systems you are dealing with?

<= 73 GB.