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Author: rr Date: Sep 19, 2008 12:57
What do you use to make a complete system backup ( 1 pc only )
and eventually a complete system restore ?
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Author: Jean-David BeyerJean-David Beyer Date: Sep 19, 2008 13:56
r wrote:
> What do you use to make a complete system backup ( 1 pc only )
> and eventually a complete system restore ?
>
I have used two superficially different methods.
>
First of all, I use cron to do it about 1AM local time when I am usually not
using the computer at all. If you use an old version of cron, you might be
better off doing it at 3 AM to avoid the switch to and from daylight saving
time.
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Date: Sep 19, 2008 14:36
On Fri, 19 Sep 2008 10:57:28 +0000, r wrote:
>
> What do you use to make a complete system backup ( 1 pc only )
> and eventually a complete system restore ?
>
One size does not fit all when making backups. What may work for me may
not work for you for a variety of reasons.
That said, one of the simplest backup techniques is to use a live CD and
an external hard drive. The external hard drive needs to have adequate
size to hold your backup images. The dramatic increase increase in storage
capacity over the past few years make them suitable to use to backup a
single pc, or even a small network. Your criteria calls for local storage,
but backing up one pc to another using a network is easy to setup, too.
A dedicated backup server is one of the first things to consider with
any netwrok, IMO. But external drives are a simple, mostly equivalent
option.
When making a backup this way, I use the tools listed below. Pick those
appropriate to meet your needs.
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Author: rr Date: Sep 19, 2008 15:50
On 2008-09-19, Douglas Mayne wrote:
>
You gave me a good tip about doing disks images and restore them via
live cd.
But, just one question. My root ( / ) is 60 GB, just 6/7 GB are used.
If I make a disk image
( for example 'dd if=/dev/sda2 of=/mnt/disco_d/backup_image' )
how much it will be the size ? ( 60 GB or 6/7 GB )
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Author: rr Date: Sep 19, 2008 16:02
On 2008-09-19, Jean-David Beyer verizon.net> wrote:>
>
I don't know a lot about cpio ( I don't have tape, but dvd/r or a backup
hd ).
I took a look to BRU, it is a lot expensive for a home pc.
Anyway I'm considering everything ; infact a good backup save time and a
lot of stress.
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Date: Sep 19, 2008 16:10
On Fri, 19 Sep 2008 13:50:39 +0000, r wrote:
> On 2008-09-19, Douglas Mayne wrote:
>>
> You gave me a good tip about doing disks images and restore them via
> live cd.
> But, just one question. My root ( / ) is 60 GB, just 6/7 GB are used.
> If I make a disk image
> ( for example 'dd if=/dev/sda2 of=/mnt/disco_d/backup_image' )
> how much it will be the size ? ( 60 GB or 6/7 GB )
>
All things being equal, an image made that way will consume 60G. There is
one trick* which can make the image as compressible as possible, though.
You could create a large file filled with zeroes which uses almost all of
the space in advance. Then when it is backed up, that zeroed space will
be easily compressible:
# dd if=/dev/sda2 | gzip >/mnt/disco_d/sda2.img.gz
Other tools are required to avoid zeroing space to minimize the backup to
the space in use. That is one of the reasons that "one size does not fit
all," and that other tools exist which have more finesse...
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Author: rr Date: Sep 19, 2008 16:55
On 19 Set, 16:10, Douglas Mayne wrote:
> On Fri, 19 Sep 2008 13:50:39 +0000, r wrote:
>> On 2008-09-19, Douglas Mayne wrote:
>
>> You gave me a good tip about doing disks images and restore them via
>> live cd.
>> But, just one question. My root ( / ) is 60 GB, just 6/7 GB are used.
>> If I make a disk image
>> ( for example 'dd if=/dev/sda2 of=/mnt/disco_d/backup_image' )
>> how much it will be the size ? ( 60 GB or 6/7 GB )
>
> All things being equal, an image made that way will consume 60G. There is
> one trick* which can make the image as compressible as possible, though.
> You could create a large file filled with zeroes which uses almost all of
> the space in advance. Then when it is backed up, that zeroed space will
> be easily compressible:
>
> # dd if=/dev/sda2 | gzip >/mnt/disco_d/sda2.img.gz
>
> Other tools are required to avoid zeroing space to minimize the backup to ...
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Date: Sep 19, 2008 17:30
On Fri, 19 Sep 2008 07:55:09 -0700, r wrote:
> On 19 Set, 16:10, Douglas Mayne wrote:
>> On Fri, 19 Sep 2008 13:50:39 +0000, r wrote:
>>> On 2008-09-19, Douglas Mayne wrote:
>>
>>> You gave me...
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Author: Jean-David BeyerJean-David Beyer Date: Sep 19, 2008 17:36
r wrote:
> On 2008-09-19, Jean-David Beyer verizon.net> wrote:>>
>
> I don't know a lot about cpio ( I don't have tape, but dvd/r or a backup
> hd ).
The man page will tell you all about it. The advantage of writing a cpio
tape (or whatever device you store the stuff on) is that you can recover
either the whole thing, or whatever subset (even a single file), if you need to.
> I took a look to BRU, it is a lot expensive for a home pc.
I agree. That is why I suggest find and cpio.
> Anyway I'm considering everything ; infact a good backup save time and a
> lot of stress.
>
True. Trying to get back where you were without a recent backup is more
stress than I can stand.
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Author: rr Date: Sep 20, 2008 18:58
On 2008-09-19, Jean-David Beyer verizon.net> wrote:>
> What I do now is use BRU to replace the _find_ and _cpio_ but it is pretty
>
does BRU uses tar ?
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