Re: Read/Write bytes directly from hard drive

From: Peter T. Breuer (ptb_at_lab.it.uc3m.es)
Date: 04/22/05


Date: Fri, 22 Apr 2005 23:35:36 +0200

asharma <theArjunSharma@gmail.com> wrote:
> We are writing a disk partitioner from scratch. We were not sure how to
> access any byte from the disk, including the master table or any other
> data. Are there any system calls that handle read/write operations?

Sure. read() and write(). Check out lseek() too.

(You asked for that :-).

What could you conceivably not be sure of? Hmm ... it sounds as though
you don't know the basic thing about unix - that everything is a file,
including the "disk". Check out /dev/hda, /dev/sda, etc.

Peter