The operating system must be reloaded onto a separate disk, which will become the primary, and old disck can be mounted as a different mount point for reference / restore. Plesk actually has a nice migration tool (PleskX.pl), and as such, a disk to disk-based migration is easy to accomplish. The following steps can be used: Mount the old drive, for example to the /restore directory. If there are several partitions on the old drive, for example / and /var, they all should be mounted as they were in the old system, so / is mounted to /restore/ and /var/ to /restore/var/Stop all Plesk services in the new system with: # /etc/init.d/psa stopallCopy the migration agent to the old drive (make sure that there is enough free disk space to perform the dump): # mkdir /restore/migration # mkdir /restore/migration/archives # cp -r /usr/local/psa/PMM/agents/shared/* /usr/local/psa/PMM/agents/PleskX/* /restore/migration chroot to the root directory of the old server (/restore in our case): # export SHELL=/bin/bash # chroot /restoreStart MySQL from the old drive in the new chrooted environment: # /etc/init.d/mysql startRun migration agent to make Plesk dump (note, this may take a few hour depending on the amount of data to backup): # cd /migration # ./PleskX.pl –dump-all -v5Move all files except for dump.xml from /restore/migration/ to /restore/migration/archive directory.You can now import data via the Plesk control panel. Select the import option on the Server->Migration page and specify /restore/migration (used in this example) as the working directory.