TITLE: 941209 System hangs with Adaptec 2740/2742 controller with
              cdrom attached.

DESCRIPTION OF SYMPTOMS:
    Attempting to access a CDROM attached to an Adaptec 2740/2742
    scsi controller causes trap or system hang.


SUMMARY OF RESOLUTION:
    Disable tagged queing for the AIC7770.ADD driver.

DETAILS OF RESOLUTION:
    1. Edit the OS2 config.sys file.

    2. Change the line

       BASEDEV=AIC7770.ADD

                  to

       BASEDEV=AIC7770.ADD /A:0 /TAG:1

    3. Shut down system and then reboot for change to take effect.

