dump/restore, how to reduce slice size
jerrymc at msu.edu
Thu Sep 29 20:10:29 UTC 2011
On Thu, Sep 29, 2011 at 10:36:38PM +0300, ??????? ??????? wrote:
> Hi, Freebsd-questions.
> # df -h
> Filesystem Size Used Avail Capacity Mounted on
> /dev/ad4s1a 2G 206M 1.6G 11% /
> devfs 1.0k 1.0k 0B 100% /dev
> /dev/ad4s1e 3.9G 13M 3.6G 0% /tmp
> /dev/ad4s1f 40G 25G 12G 67% /usr
> /dev/ad4s1d 31G 3.6G 24G 13% /var
> procfs 4.0k 4.0k 0B 100% /proc
> /dev/ad2s1f 39G 25G 10G 71% /mnt
> devfs 1.0k 1.0k 0B 100% /var/named/dev
> as you can see /dev/ad4s1f is 40G and /dev/ad2s1f is 39G
> but on ad4s1f only 25G used.
> How can I dump /dev/ad4s1f and restore it on /dev/ad2s1f?
> These commands:
> #mount /dev/ad2s1f /mnt
> #cd /mnt
> #dump -0Lf - /usr | restore -rf -
> does not help, because of ad2s1f does not have space to restore
> 'end of ' /dev/ad4s1f.
> May help any?
Well, you are going to have difficulty putting 50 GB on a 39 GB partition.
(25GB + 25GB = 50GB).
It won't work.
You could try compressing the dump, but dump files do not tend
to compress well and even if you got a 50% compression, you would
still be really close to overfill.
Probably you need to go to the store and get a nice big USB drive
and slice and partition it in to a bunch of 50 GB partitions and
pipe your dump to a restore in those partitions on that drive.
You can round-robin your backups to those USB partitions.
My backup to a USB hard drive just saved me the beginning of
this week when the old machine died of heat prostration.
> Konkov mailto:kes-kes at yandex.ru
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