Disk size after copying a disk with dd

Hi all,
I recently bought a new hard drive, larger than my old one. I thought I'd be smart, and copied partitions using dd:
dd if=/dev/sda1 of=/dev/sdb1
I noticed today that there is something wrong with the size remaining on the new drive, and after reading a bit, it looks like I should have used some specific option to prevent it from truncating my new disk.
Does anyone know how I can recover the remaining space on my hard drive ?
Thanks !

Ashren wrote:Using (g)parted from a livecd?
I have tried KDE's partitionmanager before, but could not find something that would do it. Will try with gparted if there is something in there.
graysky wrote:Can you nuke the new disk, manually partition, then rsync -avxhP /path/to/old/ /path/to/new/
Will try after gparted if it doesn't work
Thanks to both of you

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As part of cloning I am copying appl, comn and ora top to a different server. After copying the overall size at directory level is slightly lesser than the source server. For example my appl_top in source server was 22.55GB and after copying it was 22.50 in the target server, same with comn and ora.
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