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Re: 3 SysAdmin questions



On Fri, 2 May 1997, Ariel Biener wrote:

> > 2. Any recommecdations as to a good backup tool for linux? Of course,
> 
> Please ask me that on private mail, since it's inside info of tel-aviv
> universit, and I wont divulge it here. There is an answer, and I will give
> it to you there. 

I know... that top secret atomic backup system is not a secret anymore,
everyone knows, even Assad.

> > 3. There were threads in the past dealing with HD->HD duplication in the
> > case of identical disks, and several solutions were suggested. What
> > about moving an entire system to a larger disk? What is least likely to
> >cause problems - tar|tar or dd (or cp -... ).
> 
> Hmm, I have used tar in a few cases, and created exact copies. It didn't
> even require the disks being the same size, or partitioned in the same
> way. The problem with it is that it's slow(using pipes). cp -r is much
> faster, I didn't try it though. About dd, I don't know, I am always
> carefull with utilities that are raw-writing.. Anyway, I am not in the
> gurus lists you specified, but that is my experience with it.

dd would be ok for exact-same-size partitions, but I don't recommend it...
the only plus it will give you is keeping your hard links, but face it:
how many times in your life did you USE hard links? cp -a will give you
also another important "feature", defragmentation while copying...


   -------------------------------------------------------------
   Ira Abramov          <ira@scso.com>        Scalable Solutions
   POBox 3600, Jerusalem 91035, Israel       Tel (972)2-642-6822
   http://www.scso.com/~ira   Check out: http://www.linux.org.il


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