How to verify block numbers of file ?

[Greg Freemyer]

On Sun, Feb 20, 2011 at 9:02 AM, Abhijit Hoskeri
<abhijithoskeri at gmail.com> wrote:
> On Sun, Feb 20, 2011 at 6:52 PM, kashish bhatia <koolest77 at gmail.com> wrote:
>> Is there any method/command/utility to know what are the block numbers which
>> are allocated to a file in ext2 fs?
>>
>
> The FIBMAP ioctl gives you the block number give an integer, which is
> the nth block attached to the inode. It includes blocks allocated to
> store indirect blocks too.
>
> -Abhijit

hdparm has a FIBMAP argument iirc.  I've never used it.

Greg