Re: Backup on Linux

["Scott M. Stone" <sstone@example.com>]

On Fri, 22 Sep 2000, A.Sajjad Zaidi wrote:

> Im interested in this as well since most of my personal data is on hard
> drives. The most feasable backup that I can think of is tape for now. They
> usually can store 12GB uncompressed and upto 24GB compressed.
> 
> Not quite near the 70GB you re looking for, but better than the 650MB of a
> CD-R.
> 
> By the way I have a question about tape backup. At work, we do all our backup
> on tape and I was using a trial version of Bru for a while. I didnt see much
> of a difference between this and tar so now we do it the old way using tar.
> 
> We did have a problem recently when we added more data to the server. Tar
> stopped at about 10GB, complained there isnt any free space and just quit.
> That was after compression was turned on on the drive. Could this be a
> limitation of tar or is it something else?

tar seems to have a 2GB limit when writing to a regular file, but I"ve
seen it write 8GB to a tape before.  never hit the 10GB mark, though.
could it be that your tape was really only 10GB or 8GB and you were
getting a bad compression ratio?  sometimes the same type of media will
come in different lengths, like DAT tapes that come in 60m, 90m, and 120m,
and hold 1, 2, and 4GB respectively.

> 
> 
> A.Sajjad Zaidi
> 
> 
> Jonathan Shore wrote:
> 
> > I have been backing up my work in bits and pieces onto CD-R, but more
> > recently the size of my work has grown and is now spanning two 35GB disks
> > (SCSI).  Thinking about the recent talk about disk failures on the mailing
> > list, it reminded me that I'm courting a disaster.
> >
> > Are there any recommendations for backup devices or software for something
> > of this size?  I think 70GB will last for a while.  Probably won't need to
> > go beyond that for about a year (after which point will start using much
> > more expensive servers, raid, backup units, etc).
> >
> > Even if the scheme was CD-R based, but automated to do either full backups
> > or deltas would be appreciated (the automated CD-R method would appeal from
> > a cost point of view).  Also as I have both linux and NT clients (sorry
> > linux purists), I don't care whether this is linux or NT based software.
> >
> > Thanks
> >
> > JS
> >
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> -----------------------------------------------------------------------
> Next Nomikai Meeting: October 20 (Fri) 19:00   Place: Tengu TokyoEkiMae
> Next Technical Meeting: November 11 (Sat) 13:30  Place: LinuxProbe Hall
> -----------------------------------------------------------------------
> more info: http://www.tlug.gr.jp           Sponsor: Global Online Japan
> 
> 
> 

--------------------------
Scott M. Stone, CCNA <sstone@example.com>
UNIX Systems and Network Engineer
Taos - The SysAdmin Company