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Why does Windows put C: on our hard drive and not A:?

Many of you see it as something normal, but there is a curious story for which Windows establishes 'C:' for the primary hard drive and the story comes from far, far away.

Many of you may not have realized it, but when we access the 'Computer' or 'This computer' in Windows, the main hard drive appears as (C :). This name only serves to establish a path, come on, that creates an identifier and if we put more units, they begin to be named with letters from this. But why is it identified as C :, the primary unit of our system and does not start with A :, which would be logical and normal?

To know the answer, we must travel in time, specifically we have to go back some 30 years in time. The first computers developed did not use hard drives as a storage unit, they worked with floppy disks. For those who do not know that it is a floppy disk, it was a piece of plastic, which initially had dimensions of 5 ¼ inches and later became 3 ½ inches, which internally had a disk that was recorded in an induced way, which were easy to delete or fail.

The 5 ¼ floppy disks had a maximum size of 1.2MB, in the best of cases and the 3 ½ floppy disks had a size of 1.44MB, reaching a maximum of 240MB in more advanced models. We explain this because initially, the 5 ¼ units remained as 'A:', while the 3 ½ units remained as 'B:'

Hard drives didn't start to arrive until the late 80s and these drives began to register with the next available letter 'C:', which has become the standard for hard drives. These drives have become the standard for storage, primarily because the operating system was initially loaded via floppy disks. Floppy disks have already disappeared from the market, but the standard has not changed.

Windows XP was possibly the last of the operating systems in which floppy drives were installed, what's more, the IDE port of the old hard drives and floppy drives no longer even exists and many, surely, you only know the SATA, which is the current standard. Despite this, the primary hard drives, for the operating system, are still identified as 'C:' and later, letters are added, as we connect devices, such as other hard drives to store data, CD readers or recorders / DVD / Blu-ray, external memory drives and external hard drives.

If we want, we can change the lyrics, something that is not normally done. To do this we must go to 'Computer Management', we go to 'Disk Management', we right click on the unit in question, we give it to 'change the letter and paths for the unit' and we assign the letter that more interests us. It is a simple and easy process to do, which is rarely done and which Microsoft, despite the fact that the floppy disks no longer exist, has not modified.

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Robert Sole

Director of Contents and Writing of this same website, technician in renewable energy generation systems and low voltage electrical technician. I work in front of a PC, in my free time I am in front of a PC and when I leave the house I am glued to the screen of my smartphone. Every morning when I wake up I walk across the Stargate to make some coffee and start watching YouTube videos. I once saw a dragon ... or was it a Dragonite?

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A comment

  1. Almost:

    A and B were 5 1/2 inch floppy disks.
    In one the OS was introduced and in another the program, normally or in one the OS plus the program was used, and the other was used for data, the OS was even successively introduced, then the program, while in the other a disk of data and no hard drives were used.

    When hard drives reached desktops, they did so together with the new 3 1/4 inch format, but for backward compatibility a configuration where A was the 5 1/4 drive and B the 3 1/4 drive was usual.

    Later it went to configurations of 2 units of 3 1/4 and then to 1

    That later occurred when the operating system no longer fit on a disk, and necessarily had to be installed on the hard disk

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