/ 2.3. Shared Disk System Requirements | ||||
|---|---|---|---|---|
 | 2.2. Software Requirements | 2.4. Preparations |  | |
/ 2.3. Shared Disk System Requirements | ||||
|---|---|---|---|---|
| 2.2. Software Requirements | 2.4. Preparations | | |
A shared disk system (Storage Area Network, or SAN) is recommended for your cluster if you want data to be highly available. If a shared disk subsystem is used, ensure the following:
The shared disk system is properly set up and functional according to the manufacturer’s instructions.
The disks contained in the shared disk system should be configured to use mirroring or RAID to add fault tolerance to the shared disk system. Hardware-based RAID is recommended. Host-based software RAID is not supported for all configurations.
If you are using iSCSI for shared disk system access, ensure that you have properly configured iSCSI initiators and targets.
When using DRBD to implement a mirroring RAID system that distributes data across two machines, make sure to only access the replicated device. Use the same (bonded) NICs that the rest of the cluster uses to leverage the redundancy provided there.
