[Xen-users] Wrong size on a domU partition

[kazabe <kazabe@xxxxxxxxx>]

Hi.

I need more space on my domU server, so i create a file image to attach it to the domU.  But when i load that image in the domU, show a size very different to the create.

I create the file with this command

dd if=/dev/zero of=/xen/domains/SRV03/opt-disk.img bs=1024k seek=30720 count=30720

(The idea is create an image disk with 30GB, but when i check the disk on the domU show 64GB.)

attach the image to the domU

xm block-attach SRV03 tap:aio:/xen/domains/SRV03/opt-disk.img sdb1 w

so i access to domU and create the filesystem.

mkfs.ext3 /dev/sdb1

but when search the domU disk display a diferent size

 Disk /dev/sdb1: 64.4 GB, 64424509440 bytes

255 heads, 63 sectors/track, 7832 cylinders

Units = cilinders of 16065 * 512 = 8225280 bytes

Disk identifier: 0x00000000

If i mount the file image on the dom0, shows 60GB.

CONTANIER:/xen/domains/SRV03# mount -o loop opt-disk.img /mnt

df -h

/xen/domains/SRV03/opt-disk.img

                       60G  180M   56G   1% /mnt

But if i check the disk file size with du, show the expected size

CONTANIER:/xen/domains/SRV03# du -sh opt-disk.img 

31G opt-disk.img 

Why display that size?

is that a bug? or some bad parameter when create the image disk.

Im using xen 3.2 on debian Lenny

Thanks and regards.

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