How to find out length of a physical drive

galapogos

Hi,
I'm writing an applications that reads from a HDD 1 sector at a time.
I set the file pointer to the beginning of the physical drive using
SetFilePointerEx(), and then increment liDistanceToMove by 512 bytes
after each access. However, I want to know what is the length of the
physical drive so I don't overshoot it. How do I do this?
GetFileSizeEx seems to work on a folder level but my drive is
unpartitioned/unformatted so I need something that works on the
physical level.

TIA.

May 15 '07 #1

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2148

Ian Collins

galapogos wrote:

Hi,
I'm writing an applications that reads from a HDD 1 sector at a time.
I set the file pointer to the beginning of the physical drive using
SetFilePointerEx(), and then increment liDistanceToMove by 512 bytes
after each access. However, I want to know what is the length of the
physical drive so I don't overshoot it. How do I do this?
GetFileSizeEx seems to work on a folder level but my drive is
unpartitioned/unformatted so I need something that works on the
physical level.

Looks like you want a platform specific group.

--
Ian Collins.

May 15 '07 #2

Peter Nilsson

galapogos <gois...@gmail.comwrote:

Hi,
I'm writing an applications that reads from a HDD 1 sector
at a time. I set the file pointer to the beginning of the
physical drive using SetFilePointerEx(),

This isn't a standard C library function.

and then increment liDistanceToMove by 512 bytes
after each access. However, I want to know what is the
length of the physical drive so I don't overshoot it.

The C language standard can't answer that question. As such
your question is basically off topic. You should consult a
group specialising in either the interface you are using,
or the architecture you are working on.

--
Peter

May 15 '07 #3

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