Re: backup howto needed!

["DAVID B. TEAGUE" <teague@WCUVAX1.WCU.EDU>]

On Thu, 19 Mar 1998, Mario Olimpio de Menezes wrote:

> 	I just received a sony dds tape drive for our linux server and
> now I would like to do backups of some data.
> 	I have tried with tar but with little success; I can do a 
> tar cvf /dev/st0 /home and it seems to do the job. But I wasn't able to
> recover a single file from the tape with tar xf /dev/st0 file_to_extract.
> 	Could somebody help me with basics steps to backup? A howto 
> would be fine, if there is some!
> 	Maybe there is a better way to do! Someone here?

Mario

I'm going through that wih my SCSI QIC-3080 tape drive. I have been able
to backup a small colletion of files and restore them using the commands
I will list here.

I am using afio.  My commands are

     	mt -f /dev/st0 erase

(otherwise you don't get reliable results)

	find . > filelist

Edit or otherwise adjust filelist
Create archive on tape:

	cat filelist | afio -ovZ /dev/st0

To get a directory of the tape archvie,

	afio -tvZ /dev/st0

Note that this accepts some defaults you may not find desirable.  Please
read the man page. Your mileage may vary.


To extract the whole archive

	afio -ivnZ /dev/st0

to extract files matching a pattern,

	afio -ivnZ -y include-pattern -Y exclude-pattern /dev/st0

These patterns are shell regular expressions.

There are many free packages that do backups, some excellent, some
so-so. There are some commercial packages for Linux (Bru, which I don't
use. I only recall the name, and that some commercial Linux distributes
Bru with Linux.)

I found some scripts in /usr/doc/examples/afio/* I may use, or perhaps I
wlll use them for suggestions for my own scripts.

I hope this this helps.

--David

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