What is Drive?

A drive in a computer, also called the disk drive, refers to the specific location, or medium, where information, programs and files are stored and read from.

They are designed specifically to allow the users to retrieve the information from them as and when required.

Understanding Drive

What is Drive

A computer drive or disk drive is the device or medium where digital information is stored.

They allow reading, adding or removing this information as the user chooses. You can also retrieve the information from these drives when you need it.

Drives were called disk drives originally. This is because these drives usually had a round, spinning disk inside to store the files and information.

Then there were the floppy disks. These disks typically had a round and very thin piece of spinning material in them, which was about the thickness of a piece of paper.

These drives typically measured about 3-1/2, 5-1/4 or 8 inches in diameter and resided inside a paper or plastic sheath.

Floppy disk drives were used to run them. Today, a handful of people use these floppy disk drives.

There are also other different types of drives and disks available, as explained in a later section of this article.

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Typically, the drives store all programs and files used by the computer. For example, when you use the word processor to write a letter, the computer loads the specific program from the hard drive.

And, when you are done writing and want to save the document, it will be saved on the hard drive.

The drives in a computer are typically denoted by different labels and are usually used for specific purposes, though there is nothing written in stone. For example, in your computer, the drives can be as follows:

Normally, the CD-ROM drive is the last drive letter.

However, in most cases, the hard drive is exclusively the C: drive, and the CD-ROM or other disc drives are exclusively the D: drive.

Drives in a computer can be either fixed or portable. The fixed drives are not easily removable such as the hard drives in the computer.

The portable drives, on the other hand, can be removed and transported to another computer system, such as:

Identifying the Drives

The drives in a computer are quite easy to identify, provided you know how they work.

If your computer system is old and runs on a Microsoft operating system, such as MS-DOS or Windows, it may have a floppy drive. It can be either Drive A: or Drive B:, depending on the type of the floppy drive.

However, if there is no floppy drive, as it is in the case of most of the computer systems today, these drives will be missing. Instead, there will be a primary hard drive denoted as Drive C:

If the Drive C: is partitioned, it will have additional drive letters to denote every partition, though the primary partition will always be the Drive C:.

If there is a disc drive, it will be the next drive letter available by default and will be denoted as Drive D: or Drive E:.

Once again, if there are multiple partitions in your computer, the drive letters may be different.

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Using a Drive

All these drives do not work on their own and continuously. The disk must be inserted into the drive in order to use it.

For example, to open and use the optical disc drive in your computer, you will need to insert the disc into it first, or else an error message, such as “Insert a disk into the drive,” will be displayed by the computer.

If your computer is equipped with a card reader, the drive may not always be accessible even though it is always available. In order to access it, you will typically need to insert the card into the drive first.

As for the other portable drives, such as the external hard drives and USB flash drives, they are typically the last drives to be detected and usually do not show up unless they are connected to a computer system.

To open the drive and read the data on it, you will have to double-click on it in most versions of Microsoft Windows, macOS, and other Graphical User Interfaces (GUIs).

If it is connected, formatted and is free from errors, it will display the content inside it in the file explorer.

Sometimes, the drive may not open even if it is visible and accessible. The reasons for it can be any of the following:

How Many Drives are There in a Computer?

In most cases, you will have at least two separate types of drives in your computer system.

These are the floppy disk drive and the hard disk drive, wherein the former refers to the slot where you insert the floppy disks, which is hardly used today, and the latter is the standard drive that comes sealed with the computer case as a separate box and you may never even see the disk in it.

There are also cartridge-based hard disk drives available. These are usually removable and each of them has a big slot where a cartridge hard disk is inserted.

On the other hand, you may come across a few other types of drives such as:

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Here are some of the other different types of drives that were and are used in a computer system:

Apart from that, you may also have one or a couple of these other specific types of disc drives incorporated into your computer architecture such as:

Today, most of the drives listed above are hardly used, especially in a home computer. In these specific systems, the most common types of drives you will find include, but are not limited to the following:

Most of the laptop computers today will have at least the following drives:

In addition to that, these systems also come with External Serial Advanced Technology Attachment (eSATA), Universal Serial Bus (USB) and other technologies to support other external drives when connected to them.

The desktop computers, however, may also support adding additional drives to the case.


Most users usually confuse the terms drive in a computer with the driver.

No matter how similar these terms are phonetically, they are entirely separate terms and serve separate purposes.

Thanks to this article, you must now be well aware of the drives in your computer and know what specific purpose they serve.