Re: Backup schecduling
Well, I like HD mirroring because if the main system dies, I just stick the
backup HD in and reboot, and the system is running again (either on single
user doing some forensics, or 100% functional)
I hadn't considered the option of one of my backup disks dying, still I
don't favour the idea of having just a few days to realize there's a rootkit
before it spreads to the backups... I know, 5 minutes should be enough to
detect rootkits, but just in case...
Thanks for the suggestion!
Miquel
On Thu, May 17, 2001 at 05:39:15PM -0700, Alvin Oga wrote:
>
> hi ya miquel
>
> assuming you want to use two hard disk backups... ( must be important data
> ) ??
>
> main# mkdir /Backup_1
> main# mkdir /Backup_2
>
> -- you should alternate between the two backup disks/servers
> - if your main disk and your backup_1 dies...you still have
> yesterday on Backup_2
>
> have fun
> alvin
> http://www.Linux-Backup.net .. sample scripts ...
>
> Use "date"... figure out if it even or odd days...
> and mount the even or odd days backup_1 or backup_2
>
> miquel_backup.pl
> ...
> if ( $odd ) {
> mount Backup_1:/Backup_1 /Backup
> } else {
> mount Backup_2:/Backup_2 /Backup
> }
> ...
> --
> -- backup only changes since last full backup
> --
> find /home /etc /root -mtime -$cnt | tar zcvf /Backup/$DATE.tgz
> $cnt += 1
> ...
> --
> -- you should do FULL backups once a week or once a month ???
> --
> -- there are major problems with doing just 24hr incrementals
> -- you should perform incrementals since last FULL backup...
> --
>
> -- if you are worrying about intruders etc... you now have 3 boxes
> to worry about instead of just one
>
> -- you should encrypt your backups if security is an issue
>
> -- once a month...erase your old backups from few months ago... via cron
>
> -- one day, when time is available...create a new test file...
> - backup it up by manually doing the backup....
> - pretend you just have a major primary disk failure
> - and try to restore everything from backup
>
> -- now you can rest assured you have a reasonable backup ??
>
> On Fri, 18 May 2001, Miquel Mart?n L?pez wrote:
>
> > Hi all,
> > I am trying to decide on backup schecduling and have several things in
> > mind. My system is on a main hard disk, and backups are made by copying this
> > HD to another (equal sized) one.
> >
> > Now, the point is I have one main HD and 2 backup HD, and have two criteria:
> >
> > a) Backup every one or two days, alternating the backup disks, so that the
> > oldest backup is max 4 days old, and the newest is just 2
> >
> > b) Backup every one or two days with the same backup disk, and make weekly
> > backups with the other one.
> >
> > As you see, it's a compromise between having updated backups and having the
> > time to realize problems or intrusions.
> >
> > So, just wondering, what do you do/suggest?
> > Thanks!
> > Miquel Martín
> >
> >
> > --
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>
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