Section 12.6. System Recovery and Disk Mirroring

12.6. System Recovery and Disk Mirroring

The archive created by system recovery tools requires some additional steps to preserve mirrored disk configurations. Software-level disk mirroring is used by volume managers to provide redundancy of disk and filesystem resources. The data from one disk is mapped to another disk of the same size (in LVM this occurs at the logical volume level). If the one disk is no longer operational, the system remains functional based on failover mechanisms to the active disk. When the recovery archive is restored, the system recovery tools do not preserve the software-level mirroring configurations.

In the Ignite-UX environment, system administrators typically have scripts that reconfigure the software-level mirroring after the system has been installed from the recovery archive. Ignite-UX has its own configuration language, enabling custom scripts to be invoked automatically as post-configuration steps. These scripts do not exist unless the system administrator creates and then integrates them into the system recovery configuration. The following document is installed with Ignite-UX and provides instructions for modifying configuration files to restore disk mirrors:

/opt/ignite/share/docs/diskmirror.pdf

The tools covered in this chapter can be invaluable in ensuring that you can recover your HP-UX systems if their operating system disks are damaged. We hope our information proves helpful.

BackupCentral.com has a wiki page for every chapter in this book. Read or contribute updated information about this chapter at http://www.backupcentral.com.