[svlug] Question on Backup and Securities - nmap

Jason Shupe jason at stzero.net
Sat Jun 23 11:11:02 PDT 2001


On Sat, Jun 23, 2001 at 08:12:52AM -0700, Rick Moen wrote:
> begin  Alvin Oga quotation:
> 
> >  dozen different ways to do backup..depending...
> 
> He wasn't asking about backup, really.

Even though he didn't ask he should get the standard backup lecture.

Mirroring two disks in the same system doesn't protect you from user
error (accidental deletion), software/hardware problem (file
corruption), theft, and natural disaster (leaky roof, plumbing leak,
etc.)

Rsyncing on some schedule between disks in the same system only protects
you from user error and software/hardware problems until the next rsync
happens (when the file will be deleted, or the corrupt file copied to
the backup disk). And doesn't protect you from total system failure,
theft or natural disaster.

Rsyncing on some schedule between disks in different systems in
different locations protects you from natural disasters if the locations
aren't both affected, and protects you from theft (you still have your
data, but so does the guy who stole it). This still only protects you
from user error and software/hardware problems until the next rsync.

On Sat, Jun 23, 2001 at 02:20:35AM -0700, Alvin Oga wrote:
> 
> > > What is the best way to backup the whole linux system to the second
> > > drive to be identical with the boot drive? 
> 
> http://www.Linux-Backup.net  -- dozen different ways to do backup..depending...

The analysis of offsite storage on the above site is extremely weak. Look
at the O'Reilly book on backups, or the author's site or his recent
article on backups on a budget for a better perspective.

	http://backupcentral.com/

	http://www.unixreview.com/articles/2001/0106/0106i/0106i.htm




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