The creation of a shared disk volume resource with LifeKeeper will ensure that only one system at a time has write access to the volume. LifeKeeper is able to recognize that the volume is shared during instance creation so no special steps are required prior to instance creation other than to ensure the drive letter is the same on both systems.
To protect the volume from simultaneous write access, use the following procedure. In this example, two systems – SYSA and SYSB – are connected to shared storage. This storage is configured with a volume assigned with the drive letter E on both systems, then protected with LifeKeeper volume instances.
- Install LifeKeeper and DataKeeper on both SYSA and SYSB if they have not been installed. Reboot after installing.
- Assign drive letter E to the volumes; format with NTFS if not formatted yet.
- Create volume resources for E: on SYSA and extend to SYSB.
- When prompted for the application to protect, choose “Volume”.
- Choose the letter of the shared volume to protect.
- During the extend, when prompted for the Volume type choose “Shared Disk”.
Once the volume resource instance is created for the shared disk, the volume should be writable on the active system and locked on the standby.
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