restore cpanel server after harddisk fail

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Today Primary hard disk of a server failed.

Data center reloaded OS in a new Hard Disk and mounted old Hard Disk as secondary for copying data back to new hard disk.


MOUNT OLD HARD DISK

Many data center will connect second hard disk to your server, but won't mount the HDD on the server.

To find and mound secondary hard disk, following commands will help.

Get List of Hard Disk and Partitions

fdisk -l

Will list available Hard disks and partitions available on each of these hard disks.


Find Which Partition is OLD HDD

Run

df -h

To get list of parsons used.

With this, you will get an idea of which Hard disk is primary and which secondary (old HDD).

The device that mounted partitions like /, /home, /usr, /var, /tmp will be the new HDD.

Also df -h will show if the secondary hard disk is mounted or not.

In Linux, first HDD is

/dev/hda or /dev/sda (for sata)

Second Hard disk

/dev/hdb or /dev/sdb (for sata)


mount

List all the partitions that are mounted and its mount point.

Mount Old HDD Partition

Once we found the partition that have data we can mount the partition with mount command and copy data to new hard disk.

In this example, let us say, data is in partition /dev/sdb2

We will mount /dev/sdb2 as /mnt/old

mkdir /mnt/old 
mount /dev/sdb3 /mnt/old

some times, you will need to mount different partions from OLD hard disk if the folders are different partitions. For example /home, /etc, /usr, /var - any of these are on diffrenet partition, then you need mount them to get the data copied back to new HDD.


COPY DATA FROM OLD HARD DISK TO NEW

Now we can start copying back data from the old drive

rsync -vrplogDtH /mnt/old/usr/local/apache/conf /usr/local/apache
rsync -vrplogDtH /mnt/old/var/named /var
rsync -vrplogDtH /mnt/old/home/* /home
rsync -vrplogDtH /mnt/old/usr/local/cpanel /usr/local
rsync -vrplogDtH /mnt/old/var/lib/mysql /var/lib
rsync -vrplogDtH /mnt/old/var/cpanel /var
rsync -vrplogDtH /mnt/old/usr/share/ssl /usr/share
rsync -vrplogDtH /mnt/old/etc/ssl /etc/
rsync -vrplogDtH /mnt/old/var/ssl /var
rsync -vrplogDtH /mnt/old/usr/local/cpanel/3rdparty/mailman /usr/local/cpanel/3rdparty
rsync -vrplogDtH /mnt/old/var/log/bandwidth /var/log
rsync -vrplogDtH /mnt/old/usr/local/frontpage /usr/local
rsync -vrplogDtH /mnt/old/var/spool/cron /var/spool
rsync -vrplogDtH /mnt/old/root/.my.cnf /root
rsync -vrplogDtH /mnt/old/etc/httpd/conf/httpd.conf /etc/httpd/conf
rsync -vrplogDtH /mnt/old/etc/sysconfig/network /etc/sysconfig
rsync -vrplogDtH /mnt/old/etc/dovecot /etc


Copy configuration file from /etc folder from old to new HDD.

cd /mnt/old/etc 
rsync -vrplogDtH secondarymx valiases vfilters /etc
rsync -vrplogDtH exim* proftpd* pure-ftpd* passwd* group* /etc
rsync -vrplogDtH *domain* *named* wwwacct.conf cpupdate.conf /etc
rsync -vrplogDtH quota.conf shadow* *rndc* ips* ipaddrpool* ssl hosts /etc
rsync -vrplogDtH true* userdomains nameserverips demousers localaliases /etc

Since we copy /etc/passwd file, root password of the server will be same as in old hard disk.

You may change root password with

passwd


RUN CPANEL SCRIPTS

Update cpanel after data copied to new HDD.

/scripts/upcp
/scripts/updatenow
/scripts/sysup
/scripts/fixeverything 
/scripts/eximup --force
/scripts/securetmp
/scripts/easyapache