If during the installation of Windows NT, the operating system reports no Host Adapter found or gives Stop Error code 0x0000007b "Inaccessible Boot Device," follow one of the procedures below.

Suggestion for CD-ROM Installation:

Inaccessible boot device errors

Copy the following files to Disk 3 from either the 7800 Manager Set or from 7800wnt.exe:

After the Third disk is copied, the system will prompt you to remove the floppy from drive A: and reboot

Use a DOS bootable disk and boot to DOS, copy the aic78xx.sys driver from the 7800 Manager Set or 7800wnt.exe file (for the version of NT you are installing-3.1 or 3.5x) into $win_nt$.~bt directory

Remove the floppy from drive a:, and reboot

The system should now boot to the GUI portion of the Installation. After making the choices of File system, Host Adapter and general system info, the system will reboot. At this time, use the DOS bootable floppy and boot to DOS again. Go into the winnt35\system32\drivers directory, and check the file date for aic78xx.sys. It should be the old driver dated 5-24-95. Copy the new driver dated 8-14-95 or later into that directory and reboot.

Suggestion for Floppy Disk Installation:

Inaccessible boot device errors

Copy the following files to Disk 3 from either the 7800 Manager Set or from 7800wnt.exe:

After the Ninth disk is copied, the system will prompt you to remove the floppy from drive A: and reboot.

Use a DOS bootable floppy and boot to DOS, copy the aic78xx.sys driver from the 7800 Manager Set or 7800wnt.exe (for the version of NT you are installing 3.1 or 3.5x) into $win_nt$.~bt directory.

Remove the floppy from drive a: and reboot.

The system should now boot to the GUI portion of the Installation. After making the choices of File system, Host Adapter and general system info the system will reboot. At this time, use the DOS bootable floppy and boot to DOS again. Go into the winnt35\system32\drivers directory, and check the file date on the aic78xx.sys. It should be the old driver dated 5-24-95. Copy the new driver dated 8-14-95 or later into that directory and reboot.

Alternative Solution:

Depending on the amount of hard drive space available, this method might also work:

Boot to DOS with access to the cd-rom, create a temp directory on the hard drive called I386. Copy all files from the I386 directory on the CD-ROM to the I386 directory on the hard drive. After all files are copied, delete the aic78xx.sys driver from the I386 directory created on the hard drive and replace it will the aic78xx.sys driver dated 8-14-95.

Then start the floppiless install by typing winnt /b within the I386 directory on the hard drive. This procedure will eliminate needing a DOS boot disk, copying driver into the various directories.