Re: [Bacula-users] How do you backup your home computers?
2008-06-25 05:35:40
Hi,
25.06.2008 10:55, David Legg wrote:
> Kendall wrote:
>> Terry wrote:
>>
>>> DVD writer for the cost of a couple of tapes and DVD for ~AUS50c each.
>>> Chunk your data into 4gb or 8Gb packages.
>>>
>> I started to disagree and figured out that that might make sense while
>> writing this. If I did that for all of my files, it would mean writing
>> to hundreds of DVDs when I did a full backup.
>
> Tapes are nasty horrible devices! They're expensive,
Only when you think about rather small capacities... once you need a
few TB, tapes plus drive are cheaper than reliable hard disks.
> slow
A decent tape drive is much faster than a hard disk is today.
> and very
> prone to letting you down just when you need them most (IMHO).
My experience is completely different - unless you talk about 4mm
helical scan technology, i.e. DDS.
> Not only
> that but new (incompatible) tape formats seem to come out all the time
> making archiving very difficult.
I disagree, again. Of course you have to keep a working drive for
long-term storage anyway, but that's not much different for hard disk.
You recall Syquest drives with 5,25"-cartridges that were in use a few
years ago? You won't easily find a drive today to read your old media
now... and I don't expect USB 1 will be around in a few years...
> For home use I'd recommend an external USB 500GB or 1TB device.
Here I agree.
> Just
> beware that some of these devices don't appear to be designed for
> continuous use.
Yup... and they don't like to be handled roughly.
But that has been discussed in great detail only recently... see the
"Why do people use tapes?" thread.
Arno
> I have a small Ubuntu Linux machine which, once a day, sucks the essence
> out of various Windows based laptops on the home network. I schedule
> the backups during the day so that there's a better chance the machines
> are on and connected (I haven't got it to delay a backup until the
> machine appears online yet).
>
> I chunk the volumes to 4.2GB in case for some reason I have to move them
> using DVD... though that's never happened yet.
>
> Just beware of a slight niggle with backing up some folders on a Windows
> machine. Even when nobody has used the machine since the last
> incremental backup it still seems to backup a minimum of 1.6GB per
> machine. I guess this is because Windows seems to use a lot of large
> files of which small areas get altered; resulting in the need to backup
> the whole file.
>
> If Bacula supported an rsync style backup that could somehow only backup
> the bits of each file that have changed instead of the whole file that
> might solve it.
>
> Actually, without this feature backing up onto DVD would be very time
> consuming as you'd have to put in a new one far more often than would be
> practical.
>
> David Legg
>
>
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--
Arno Lehmann
IT-Service Lehmann
www.its-lehmann.de
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