If your Adaptec 2940 BIOS is setup to allow booting a CD-ROM, you may experience:
CD-ROM became Drive C: ,Hard Drive became Drive D:
Error: "MISSING OPERATING SYSTEM"BIOS 1.23
CD-ROM does not become DRIVE C:
Error: "BOOT: Memory overflow error Please insert another disk."To fix the problem, upgrade the BIOS to
1.25 or later.