You ran out of space and added a eighth disk to your SCSI-1 system.
When you try to start, the system no longer boots.
What is most likely the cause of this problem?

A.
SCSI-1 supports only 6 disks per adaptor

B.
There is a SCSI-ID conflict that causes that problem

C.
You forgot to set the SCSI-ID #8 for the new disk

D.
SCSI-1 supports only 8 devices including the adaptor

Explanation:
The controller is counted as one device.