Comments on: How-to grow any Qemu system image

By: kev

kev — Mon, 01 Aug 2011 08:13:25 +0000

@cat: no, the cat command is good in my original article. The use of cat there is convoluted, but good. If you're looking for a better cat command, look at those proposed in the comments above.

By: cat

cat — Fri, 29 Jul 2011 11:06:59 +0000

you should really change that cat command, this will overwrite the second file. you need to use >> instead of >

By: QEMU qcow2 free_clusters failed 問題排除 « Jamyy's Weblog

QEMU qcow2 free_clusters failed 問題排除 « Jamyy's Weblog — Mon, 21 Feb 2011 07:22:56 +0000

[...] 把一些沒用到的、系統隱藏的軟體給移除掉, 勉強清出一些空間另外參考了這篇文章, 把虛擬機器的硬碟空間擴增 2GB, [...]

By: Adam Dyga

Adam Dyga — Fri, 10 Dec 2010 11:06:55 +0000

Probably the easiest way to grow a raw disk image is:

truncate -size new_image_size disk.raw

where new_image_size is larger than existing disk.raw.

By: Mark Tomich

Mark Tomich — Wed, 12 May 2010 17:58:17 +0000

There’s a better way to do the data append than by creating huge files and cat’ing them together…try this to use sparse files and save a bunch of space:

dd if=/dev/zero of=system.raw bs=1 count=1 seek=$((  - 1 )) conv=notrunc

By: Le Repaire du Sanglier des Ardennes » Blog Archive » [Kvm] Convertir une image virtuelle.

Sun, 06 Sep 2009 19:57:13 +0000

[...] http://kevin.deldycke.com/2007/04/how-to-grow-any-qemu-system-image/ Cet article a été publié le Jeudi 3 septembre 2009 à 22 h 46 min et est classé dans Kvm, [...]

By: tartanandsnarly

tartanandsnarly — Mon, 03 Nov 2008 20:49:57 +0000

Hi,
Just to say that I accomplished this on windows by replacing the dd and cat steps – with the windows type command…..

I created the raw image:

CMD> qemu-img convert disk.qcow -O raw rawdisk1.raw

then created a copy of that:

CMD> copy rawdisk1.raw rawdisk2.raw

then used that to create a 3rd disk:

CMD> type rawdisk1.raw rawdisk2.raw > rawdisk3.raw

rawdisk3 could then boot normally both using qemu (in which case it was in the same condition as rawdisk1) and using the gparted iso – in which case the extra space could be seen.

I manipulated the partitions using gparted and grew the disk.

…as they say in Scotland – nae bother!

By: mjs

mjs — Thu, 22 May 2008 01:55:50 +0000

Install a qemu guest with linux and do it

Serious (or not) do not know!

Great tutorial btw, thanks

By: Porch

Porch — Wed, 16 Apr 2008 17:32:38 +0000

hello!
Great tutorial, but how i do it in windows?

By: phil

phil — Fri, 04 Apr 2008 02:36:12 +0000

I tried

cat zeros.raw >> system.raw

and it works!

At least for me, it’s an old linux ext2 image.

I also tried a gparted twist without the liveCD:

losetup /dev/loop1 system.raw
gparted /dev/loop1

it can see it, but cannot resize it

e2label: Bad magic number in superblock ...