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Disk geometry from /sys

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From: Francis Moreau <francis.moro@...>
To: <linux-kernel@...>
Subject: Disk geometry from /sys
Date: Wednesday, April 9, 2008 - 4:53 pm

Hi,

I'm trying to know the geometry of my hard disk from a bash script
and that's the reason I'm looking in /sys. The reason is that I'd like
to figure out the size of a cylinder without doing a
ioctl(bdev, HDIO_GETGEO, &geo)

Unfortunately I can't find anything useful and this is certainly a sign
that I'm doing something wrong.

Or maybe can I simply assume from my script that the geometry
is always heads=255 and the number of sectors per track is 63 for all
disks.

Looking at parted(8) source code, I  can find this:

/* The GETGEO ioctl is no longer useful (as of linux 2.6.x).  We could
 * still use it in 2.4.x, but this is contentious.  Perhaps we should
 * move to EDD. */

Could anybody give me some advices ?
-- 
Francis
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Messages in current thread:
Disk geometry from /sys, Francis Moreau, (Wed Apr 9, 4:53 pm)
Re: Disk geometry from /sys, Seewer Philippe, (Mon Apr 14, 8:57 am)
Re: Disk geometry from /sys, Francis Moreau, (Tue Apr 15, 3:40 am)
Re: Disk geometry from /sys, Seewer Philippe, (Wed Apr 16, 3:49 am)
Re: Disk geometry from /sys, Francis Moreau, (Thu Apr 17, 10:09 am)
Re: Disk geometry from /sys, Seewer Philippe, (Thu Apr 17, 10:49 am)
Re: Disk geometry from /sys, Francis Moreau, (Tue Apr 22, 4:10 pm)
Re: Disk geometry from /sys, Seewer Philippe, (Wed Apr 23, 2:48 am)
Re: Disk geometry from /sys, Mark Lord, (Fri Apr 18, 9:22 am)
Re: Disk geometry from /sys, Francis Moreau, (Tue Apr 22, 4:16 pm)
Re: Disk geometry from /sys, Mark Lord, (Tue Apr 22, 6:44 pm)
Re: Disk geometry from /sys, Francis Moreau, (Wed Apr 23, 3:02 am)
Re: Disk geometry from /sys, Mark Lord, (Wed Apr 23, 9:47 am)
Re: Disk geometry from /sys, Seewer Philippe, (Wed Apr 23, 5:33 am)
Re: Disk geometry from /sys, Seewer Philippe, (Wed Apr 23, 2:53 am)
Re: Disk geometry from /sys, Seewer Philippe, (Fri Apr 18, 9:37 am)
Re: Disk geometry from /sys, Francis Moreau, (Tue Apr 22, 4:11 pm)
Re: Disk geometry from /sys, Seewer Philippe, (Wed Apr 23, 2:44 am)
Re: Disk geometry from /sys, Francis Moreau, (Wed Apr 23, 2:56 am)
Re: Disk geometry from /sys, Bill Davidsen, (Thu Apr 10, 9:58 am)
Re: Disk geometry from /sys, linux-os (Dick Johnson), (Thu Apr 10, 8:22 am)
Re: Disk geometry from /sys, Francis Moreau, (Thu Apr 10, 3:15 pm)
Re: Disk geometry from /sys, Mark Lord, (Wed Apr 9, 5:57 pm)
Re: Disk geometry from /sys, Francis Moreau, (Thu Apr 10, 3:05 pm)
Re: Disk geometry from /sys, Mark Lord, (Thu Apr 10, 3:53 pm)
Re: Disk geometry from /sys, Lennart Sorensen, (Wed Apr 9, 5:28 pm)
Re: Disk geometry from /sys, Francis Moreau, (Thu Apr 10, 3:23 pm)
Re: Disk geometry from /sys, Bernd Eckenfels, (Wed Apr 9, 6:16 pm)
Re: Disk geometry from /sys, Lennart Sorensen, (Thu Apr 10, 10:52 am)
Re: Disk geometry from /sys, Alan Cox, (Wed Apr 9, 5:52 pm)