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Legato NetWorker, Release 7.0
Disaster Recovery Guide
3
Prerequisites
30
Task 1: Install the Operating System
To install the operating system:
1. Install the same version and patch level of the UNIX operating system.
Specify the same installation locations that were used in the predisaster
installation of the operating system. For installation information, refer to
the appropriate UNIX documentation.
If you want to upgrade the operating system, recover the predisaster
version of the operating system before performing any upgrades.
2. Re-create all of the filesystems that were previously on the computer.
The filesystems must be:
• The same filesystem type.
• At least the same partition size as the original to hold all of the data
that was previously backed up.
At a minimum, configure the root volume group and kernel parameters,
such as asynchronous I/O. If the resources are available, reconstruct
nonroot volume group filesystems and logical volumes.
Task 2: Configure the Operating System
To configure the operating system:
1. Configure the network exactly as it was before the disaster. If you do not,
the NetWorker software will treat the computer as a new computer. If the
computer has a different host ID, you must reregister the NetWorker
software. For information on registering the NetWorker software, refer to
the appropriate Legato NetWorker Installation Guide.
2. If you are recovering the operating system to a different computer, assign
the same hostname to the new computer. Otherwise, you will not be able to
recover the NetWorker indexes associated with the original computer.
3. Configure the date and time as they were before, including the time zone.
4. Install any additional UNIX components or services before recovering the
computer’s data.
5. Reboot the computer.