[Techtalk] backup - tar

[Elwing]

One comment I have to put in about using dump and restore is that it 
doens't work on all file systems.  Definately ext2, definately "not" 
ReiserFS (3).  Not sure about other Linux supported file systems - 
although I see no reason why ext3 wouldn't work as well.  But you have 
to have a dump and restore specific to the file system type available.

Laura

Disclaimer: yes, I know that there is a dump and restore for reiserFS, 
but I never got it working when I was playing with it ~ 2 yrs ago. I'm 
waiting for the tar/dump to DVD :)



maria wrote:

> Our file system is too large to fit on a tape without zipping it first.
>   It has actually worked in the past, it's just doesn't work
> consistently, and I can't figure out why not.  We prefer to do periodic
> full backups to incremental, for reasons that I've never been quite sure
> of...  I will take a look at dump and restore, and see if that might
> work for us.
> 
> thanks a bunch,
> maria
> 
> Laurel Fan wrote:
> 
>> On Mon, Aug 30, 2004 at 12:04:20PM -0700, Maria McKinley wrote:
>>
>>> I am using tar to backup, and I am really frustrated with it.  It 
>>> keeps going through a dozen or so files, and then quitting with no 
>>> explanation.  It does this no matter which files I try to backup.  
>>> The command I use is:
>>>
>>> nohup tar -czvf /dev/nst0 --atime-preserve /home > /tmp/backup &
>>
>>
>>
>> I've never tried to use tar on an actual tape drive, so none of this
>> is from actual experience.  Have you tried it without the z option?  I
>> don't know how well gzipping interacts with writing to a tape device.
>> Also, the 'dump' and 'restore' commands deal with backing up an entire
>> filesystem, which looks like what you may be doing.  Dump also has
>> incremental backup, which may be useful to you.  This page describes
>> it:
>>
>> http://surf.ap.seikei.ac.jp/~nakano/dump-restore/dump-restore-mini-HOWTO.en.html#s3 
>>
>>
> 
> 
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