Utilizing a 16-bit SCSI bus, you have daisy chained 9 devices. You want to make sure that the HDD is first to boot. Which SCSI ID's should be given to the HDD & HBA?
A. 0,7
B. 7,0
C. 8,0
D. 0,8
Answer:
A
The priority that a device has on the SCSI bus is based on its ID number. For the first 8 IDs, higher numbers have higher priority, so 7 is the highest and 0 the lowest. For Wide SCSI, the additional IDs from 8 to 15 again have the highest number as the highest priority, but the entire sequence is lower priority than the numbers from 0 to 7. So the overall priority sequence for wide SCSI is 7, 6, 5, 4, 3, 2, 1 , 0, 15, 14, 13, 12, 11, 10, 9, 8.
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