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Windows 7: Why is there no A or B partition

17 Mar 2010   #1
Microsoft MVP

Vista, Windows7, Mint Mate, Zorin, Windows 8
Why is there no A or B partition

Someone asked me today why the partition numbering always starts with C and why there are no A or B partitions. I did not know the answer. Does anybody know?

My System SpecsSystem Spec
17 Mar 2010   #2
Product FRED

Windows 7 Enterprise 64-bit

Letters A and B are reserved for Floppy Drives. C to Z are reserved for Hard Disks, CD, DVD, TAPE and Other Magnetic Drives and Disks.
My System SpecsSystem Spec
17 Mar 2010   #3

Windows 7 Ultimate 64Bit

They were reserved for floppy drives, but if you format a partition in W7 it will give you the option to name it A or B. I was surprized myself.
My System SpecsSystem Spec

17 Mar 2010   #4

Windows 8.1 Professional x64

Possibly due to past practice of reserving A & B for floppy drives? I know you can still set it later... I made my back-up HDD drive B:
My System SpecsSystem Spec
17 Mar 2010   #5
Microsoft MVP

Vista, Windows7, Mint Mate, Zorin, Windows 8

Thanks guys. That was simple. I was not around PCs during the floppy times so I did not know that. One never stops learning.
My System SpecsSystem Spec

 Why is there no A or B partition

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