Introducing Arcserve Backup Agents and Options › Using Options › Disaster Recovery Option › Recovering Clusters › Cluster Failure Scenarios › Requirements › Shared Disk Requirements

Shared Disk Requirements

To recover your clusters, you must meet the following requirements:

• All shared disks, including the quorum disk, must be physically attached to a shared bus.
• Verify that disks attached to the shared bus can be seen from all nodes. This can be checked at the host adapter setup level. See the manufacturer’s documentation for adapter-specific instructions.
• SCSI devices must be assigned unique SCSI identification numbers and properly terminated, as per manufacturer’s instructions.
• All shared disks must be configured as basic, as opposed to dynamic.

We strongly recommend the use of fault-tolerant RAID configurations (for example, RAID level 5) for all disks, rather than stripe sets without parity (for example, RAID level 0) although this is not a shared disk requirement.