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Message-ID:	<3F9653F3.3000507@futarque.com>
Date:	Wed, 22 Oct 2003 11:54:59 +0200
From:	Christian Damkjer George <cdg AT futarque DOT com>
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To:	cygwin AT cygwin DOT com
Subject:	block size in /proc/partitions bug?

Hi

I am working on a tool which reads raw from a disk via cygwin's /dev/sdX 
interface, which works fine. But I need to determine the size of the 
disk preferably in sectors. I can not find a get ata identity 
functionality in cygwin, but I can live without it if I could get the 
disk size elsewhere. My disk is 40 Gb which is divided in to two 
partitions on 20Gb each. "df" reports 19567136 and 20625392 1k-blocks 
each, which is the correct size. But /proc/partitions says 313074216 and 
330167880 which is about a factor 0.0625 of compared to linux. Why this 
strange factor it seems like you accidently multiplied by 16.
My cygwin version is 1.5.5-1

/Christian

--------------------------- Dump of my win2k running cygwin
cdg AT luke /usr/bin 3670-4
$ cat /proc/partitions
major minor  #blocks  name

   17    32 643242600 sda
   17    33 313074216 sda1
   17    34 330167880 sda2

cdg AT luke /usr/bin 3670-4
$ df
Filesystem           1k-blocks      Used Available Use% Mounted on
C:\cygwin\usr\X11R6\lib\X11\fonts
                      19567136  13020552   6546584  67% 
/usr/X11R6/lib/X11/fonts
C:\cygwin\bin         19567136  13020552   6546584  67% /usr/bin
C:\cygwin\lib         19567136  13020552   6546584  67% /usr/lib
C:\cygwin             19567136  13020552   6546584  67% /
c:                    19567136  13020552   6546584  67% /cygdrive/c
h:                    20625392  15101200   5524192  74% /cygdrive/h

------------------- Dump of linux server ---
cdg AT zaphod ~/unixenv 3670-4
$ cat /proc/partitions
major minor  #blocks  name

   9     0    2931776 md0
   9     1    2931776 md1
   9     2   14490560 md2
   9     3   14498560 md3
   9     4   28988992 md4
   9     5   70830336 md5
   8     0   17921835 sda
   8     1     489951 sda1
   8     2    2931862 sda2
   8     3   14498662 sda3
   8    16   17921835 sdb
   8    17     489951 sdb1
   8    18    2931862 sdb2
   8    19   14498662 sdb3
   8    32   35916548 sdc
   8    33     497983 sdc1
   8    34   35415292 sdc2
   8    48   17921835 sdd
   8    49     489951 sdd1
   8    50    2931862 sdd2
   8    51   14498662 sdd3
   8    64   17921835 sde
   8    65     489951 sde1
   8    66    2931862 sde2
   8    67   14498662 sde3
   8    80   35916548 sdf
   8    81     497983 sdf1
   8    82   35415292 sdf2
   3     0   39082680 hda
   3     1   39078081 hda1

cdg AT zaphod ~/unixenv 3670-4
$ df
Filesystem           1k-blocks      Used Available Use% Mounted on
rootfs                 2885728   2696840     42300  99% /
/dev/root              2885728   2696840     42300  99% /
/dev/md5              69717728  11478056  54698156  18% /store2
/dev/hda1             38464340  24432912  12077524  67% /store1
AFS                    9000000         0   9000000   0% /afs
/dev/md4              28533316  23185864   3898004  86% /home


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