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This section describes procedures used to reinstall VxVM and preserve as much of the original configuration as possible after a failure.
All VxVM-related information is removed during reinstallation. Data removed includes data in private areas on removed disks that contain the disk identifier and copies of the VxVM configuration. The removal of this information makes the disk unusable as a VM disk.
The system root disk is always involved in reinstallation. Other disks can also be involved. If the root disk was placed under VxVM control, that disk and any volumes or mirrors on it are lost during reinstallation. Any other disks that are involved in the reinstallation, or that are removed and replaced, can lose VxVM configuration data (including volumes and mirrors).
If a disk, including the root disk, is not under VxVM control prior to the failure, no VxVM configuration data is lost at reinstallation.
Although it simplifies the recovery process after reinstallation, not having the root disk under Veritas Volume Manager control increases the possibility of a reinstallation being necessary. By having the root disk under VxVM control and creating mirrors of the root disk contents, you can eliminate many of the problems that require system reinstallation.
When reinstallation is necessary, the only volumes saved are those that reside on, or have copies on, disks that are not directly involved with the failure and reinstallation. Any volumes on the root disk and other disks involved with the failure or reinstallation are lost during reinstallation. If backup copies of these volumes are available, the volumes can be restored after reinstallation.