Need script for fdisk Command

[@m!t]

Hi,
I have some testing requirement,need to write script for fdisk command.
I have done the following steps:
1)-------------------------------------------------
#!/bin/sh
fdisk /dev/sda < /root/second.sh
-----------------------------------------------
and the second (answer to fdisk)
---------------------------------------------
n
p
1
t
fb
w
This Script is working,But this is not taking id (which is fb,for vmfs partition),Which is not mentioned in fdisk option also.Is there any way to give that id ?
Thanks in advance.
Amit

[eggi]

Hey There,

Instead of fb, check out fdisk manually and note the number associated with it. I think you have to put the number, instead of "fb" for it to work.

Hope that helps

, Mike

[@m!t]

Hi,

In fdisk ,when I do manually ,There is no option for 'fb' win hex list,It is unknown one, Still it is taking ,if i do manually.
While using script it is failing and taking the default one 'linux'.

-Amit

[eggi]

Hey Amit,

Bummer. Can you try this. For some reason, it works on my vmware. Of course, step through it first (I'd hate to destroy anything).

n
p
t
1
fb
w

I just had to reverse the "t" and the "1"

If that doesn't help you out, let me know. I'm curious to see how this gets fixed.

Best wishes

, Mike

[i92guboj]

The fdisk stuff can be self contained, no need for a second file. This, works for me:

# cat a
#!/bin/sh
fdisk /dev/sda << EOF
t
1
fb
p
q
EOF
# LC_ALL=en sh a

The number of cylinders for this disk is set to 60801.
There is nothing wrong with that, but this is larger than 1024,
and could in certain setups cause problems with:
1) software that runs at boot time (e.g., old versions of LILO)
2) booting and partitioning software from other OSs
   (e.g., DOS FDISK, OS/2 FDISK)

Command (m for help): Partition number (1-4): Hex code (type L to list codes): Changed system type of partition 1 to fb (Unknown)

Command (m for help): 
Disk /dev/sda: 500.1 GB, 500107862016 bytes
255 heads, 63 sectors/track, 60801 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0x00046001

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1               1       60540   486287518+  fb  Unknown
/dev/sda2           60541       60801     2096482+  82  Linux swap / Solaris

Command (m for help):

I don't know why is it failing for you. I only removed the stuff to create a partition (since it would failt on my live system, of course) and the stuff to write the partition table (for obvious reasons).

[@m!t]

Mike,

I have tried with reverse option.

second file sequence is
n

p

t

1

fb

w..
Still I am getting Linux partition..
I don't know why

-Amit

[@m!t]

Hi,

This problem is solved by using this sequence:

n
p
1
t
fb
t
fb
w

For me ..this is working fine..

Really no idea..why i need to mention the parameter (t,fb two time..)

Thanks for your response...
-Amit

[eggi]

Cool - glad you got it working

i92guboj's solution is more elegant and I can't believe I didn't think of it Using a "here document" is probably going to be easier to understand later

Best wishes,

Mike

[Lakshmipathi]

Looks like problem solved , but I'm having some basic doubts .
How to pass arguments to shell script like you do here,passing arguments to fdisk.
Let me know if you got any links about this topic...
So far i thought you can't using interactive commands in shell script

[@m!t]

Hi,

Scripts are like this:

fdisk_command.sh

#!/bin/bash
fdisk /dev/sda < /script.sh

script.sh
#!/bin/bash
n
p
1
t
fb
w

you have to pass parameters like this...

-Amit