backup a mailserver

[wesley]

Hi everyone,

I have a mailserver (OpenBSD 4.7 : wd0a, wd0b slices).
I want to backup entire OS.
So i done that :
Plug on the mailserver a USB Hard-disk (FAT32, sd0i)
mount /dev/sd0i /mnt
dump -0auf /mnt/backup_os wd0a
-> terminated without any errors.

I have an other machine (exactly the same hardware than the mailserver machine), i want now to restore my dump on it.
I booted OpenBSD 4.7 iso release
I choosed [SHELL]
use fdisk and diskpart utility for create slices (wd0a, and wd0b)
newfs wd0a
mount /dev/wd0a /mnt
mount /dev/sd0i /mnt2
cd /mnt
restore -rf /mnt2/backup_os

I ve got a lot of errors like : Expected next file 164898, got 102090
And inode errors…

Please how can i restore my dump without any errors ?
thanks.

[jggimi]

You are backing up a system with open files and running processes. Guaranteed 100% filesystem integrity can only be assured by backing up a static system from single user mode.

If your mail server uses a database, you can back up modern DBMSes with full integrity while they are operational using the DBMS tools.

[wesley]

What is DBMS Tools ?

[ocicat]

Originally Posted by wesley

What is DBMS Tools ?

Each of the major databases (MySQL, PostgreSQL, etc.) have their own tools. Look into the documentation associated with whatever you are currently using.

Likewise, is there a reason why you are using FAT32? Why not FFS?

[Carpetsmoker]

DBMS

A Database Management System (DBMS) is a set of computer programs that controls the creation, maintenance, and the use of a database.

In other words: mysql_dump or pg_dump or [something else] depending on your database software.