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Become a qualified IT technician in just 70 learning hours .

The National BTEC Award in Computer Engineering is the first UK Nationally recognised qualification in Computer Assembly, Repairs and Maintenance.

The course acts as a perfect platform allowing you to pursue a career in IT. Try find out more click on HOME

Q. I am up to setting the CMOS and it says the Boot Sequence should be set to: A,C,SCSI.  I don't really understand what this means, can you explain?

A.  At this stage the important part to understand with the boot sequence is the A,C part. This means that, when booting the computer will first look into the A: drive for a bootable disk, if it doesn't find one it will then look at C: (the Hard Drive).

If we had a boot sequence of C,A it would look at the hard drive first then the A: drive.

We say that A,C is the Standard boot sequence because we are currently using start-up disks etc to format and partition the blank hard drive. There are many points within the course that could be argued and this is one of them. For example, many modern Operating Systems install straight from the CD-ROM so some may argue that the Standard boot Sequence is now CD-ROM,C, A. Despite this we have to understand that the BTEC must follow a syllabus and for the sake of passing the qualification the cannot be argued with. So the standard Boot Sequence is A,C.

Now for the third option A,C,SCSI or A,C,CD-ROM. This is simply a variation you may find in different computers for the third option.

The First Option refers to SCSI, this is pronounced Scuzzy and stands for Small Computer System Interface. This is something not really covered by the syllabus and so don't worry to much about it. Essentially SCSI is an alternative to the IDE devices we normally use. We can have SCSI Hard Drives, CD-ROM Drives and even external devices such as Scanners. SCSI is much faster and allows for more devices to be connected. With this improved performance comes a much higher cost and this is why we very rarely find SCSI in Home or Office computers, but normally only in High end machines such as Servers.

In terms of the course, in the final exam, if you are asked a question What is the standard boos sequence? you will gain top marks for A,C or A,C,SCSI or A,C,CD-ROM the important bit is the A and the C.

I hope I explained that ok, if you sure still having trouble understanding it, don't worry. I would suggest carrying on. Often some of these bit we do at the early stages can be a bit of a mystery until we move further with things. Then they seem to become a bit clearer later on.

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