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From: Thomas Bellembois <thomas.bellembois@gmail.com>
To: linux-lvm@redhat.com
Subject: [linux-lvm] LVM snapshot - "dd" file size
Date: Wed, 16 Apr 2008 16:59:05 +0200	[thread overview]
Message-ID: <48061439.6040001@gmail.com> (raw)

Hi!

I am using LVM partitions on a Debian Xen system.
I use LVM snapshots to clone and backup my virtual machines.

I have noticed that the ISO file created with the "dd" command it much
bigger that the partition used space (actually 4.7GB for the ISO - 500MB
used space). No problem if I mount the LVM snapshot and "tar" all of the
data.

I have googled the question and read that "dd" also copy "not used space".
Why is the ISO file so big ? Is the "tar" method less safe ?
Is there a better solution ?

Thanks for your answers.

Regards,

Thomas

             reply	other threads:[~2008-04-16 14:59 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-04-16 14:59 Thomas Bellembois [this message]
2008-04-16 21:04 ` [linux-lvm] LVM snapshot - "dd" file size dave
2008-04-16 21:36   ` Denie Andriessen
2008-04-17 12:44     ` Thomas Bellembois

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