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how to detect size of IDE device

Hi. I am writing a script to detect the sizes of the IDE devices connected to my system. What is the most accuate way of doing it. Right now I am mouting the device on one of my directory adn then give the command df -h to check the size.

Is there any other way by which I can check the total size of device with mounting them??

Thanks

Try the command: sfdisk -s /dev/hda

Quote:

Originally posted by homey
Try the command: sfdisk -s /dev/hda

hey that worked. Also, it gives the output in KBs. Is there any way(through a command) by which i can divide it with 1000(just corrected) so that I get the output in MB straightaway. Some thing like:
sfdisk -s /dev/hdc | (divide operation here).

Thank you once again.

1mb is actually 1024kb not 100

of course this is file system size for a meg and not the hardware industry standard meg

to make this more confusing blocks change size too with file system.

as far as what command can be used mabye calc but im not sure at this very moment what the baisc program is for math operations with bash.

If you don't care about the remainder, you can perform the division in bash.
mbsize=(( $kbsize/1024 ))

Yeah I understand what you are saying . But in the first place how can I get the output of the command sfdisk -s /dev/hdc into the variable $kbsize?

Thanks

I made a script a while back to show how much un-partitioned space was left on a drive.
Here is a snip for what you want....

Code:

#!/bin/bash

# Example: ./test /dev/hda

drive=`/sbin/sfdisk -s $1`

size=$(($drive / 1024))

echo " Total drive size    $size  MB"

Here is the original script.

Code:

#!/bin/bash

##### This script calculates hard drive space.

##### example:  ./drive /dev/hda



##############################################

#  Ensure that root is running the script.

#

WHOAMI=`/usr/bin/whoami`

if [ $WHOAMI != "root" ]; then

        echo

        echo "You must be root to run this!"

        echo

      exit 1

fi

##############################################



usage()

{

  echo "Usage: $0 /dev/hd#"

  exit 1;

}



test "$1" || usage



if ! [ -e $1 ]; then

    echo "$1 does not exist. Exiting."

    exit 1

fi



if [ -e $1 ]; then



drive=`/sbin/sfdisk -s $1`

echo

for i in `/sbin/sfdisk -l $1 | \

grep -e "^[/dev]" | awk '{print $1}'`;

do

a=`/sbin/sfdisk -s $i 2> /dev/null`

part=$((($a + 0) / 1024))

totalused=$(($totalused + ($a + 0)))

echo "Partition $i used $part MB"

done

echo



else

    exit 1

fi



#####

size=$(($drive / 1024))

used=$(($totalused / 1024))

free=$((($drive - $totalused) / 1024 +1))

#

echo " Total drive size    $size  MB"

echo " Partitioned size    $used  MB"

echo " Unpartitioned size  $free  MB"

echo

echo

#####End

That;sGreat!!! Thanks you so much. :)

To know the total size in MB you could also do :

Code:

sfdisk -s -uM /dev/hda