I believe what you're looking for is DRBD ( www.drbd.org ) provided by
Linbit.  If you need assistance please let me know.

Benedict simon wrote:
> Dear All,
>
> I have the following setup runnng perfectly fine for about 2 years
>
> Centos 4.1 but now centos 5
> Primary DNS server using bind
> Mailserver using sendmail
> MailScanner 4.65 with SapmAssassin + clamav
> Apache
> Mailwatch
> SquirelMail
>
> all the above is working perfectly fine
>
> Now I have another server with same hardware configuration which i would
> like to make it as a backup server
>
> so incase my Primary server which is now working fine fails the secondary
> takes over and users are not affected at all. something like file server
> mirroring
>
> how could i go over it.
> apprecite if any one cd help me
> or suggest me some links which could explain the above.
>
>
> regards
>
> simon
>
>
> i jus started reading about
>
>
>
>   
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