A question was recently asked by a small group of friends
Why does the computer start at drive C. Where did drives A and B go?
Since there is this doubt, read on
- What are the A and B disks?
Back in the 1980s, computers used floppy disks for storage, and there were no CD-ROM drives, hard disks, or USB drives back then.
At that time, the commonly used floppy disks were divided into two kinds, namely, 3.5-inch floppy disks and 5.25-inch floppy disks, which corresponded to 3.5-inch floppy disk drives and 5.25-inch floppy disk drives, respectively.
At that time, the computer was equipped with two floppy disk drives called "A drive" and "B drive", two kinds of floppy disks were inserted into the drives, so the calculator would be called "A disk" and "B disk", so AB became the disk letter of the two kinds of floppy disks. The two floppy disks were plugged into the drives, so the calculator would be called "Disk A" and "Disk B" respectively, so AB became the disk letter of the two floppy disks.
- What happened to disks A and B that have since disappeared?
Originally, the main purpose of floppy disks was to facilitate copying from floppy disk to floppy disk.
Of these, disk A is reserved for 3.5-inch floppy disks, while disk B is reserved for 5.2-inch floppy disks.
However, with the rapid development of computer technology and the frequent use of some music and video software, the 1.44MB capacity of the 3.5-inch disk is not enough.
Around 2005, floppy drives slowly began to be removed from the standard equipment of computers. The expansion of hard drives, mobile hard drives, USB flash drives and other high-capacity mobile devices were born, but also let the floppy disk out of the stage of the important reasons.
Now that floppy drives are a thing of the past, and the system is purposely empty of disks A and B, as if to pay homage to the history of human computer development!
