Hba Configuration; Risks; Limitations - HP StorageWorks 4400 User Manual

• Single path HBA server can be in the same fabric as servers with multiple HBAs.
• In the use of snapshots and snapclones, the source virtual disk and all associated snapshots and
snapclones must be presented to the single path hosts that are zoned with the same controller. In
the case of snapclones, after the cloning process has completed and the clone becomes an ordinary
virtual disk, you may present that virtual disk as you would any other ordinary virtual disk.
• Single HBA path to the host with MPIO driver enabled to provide recovery from controller on
controller link failures.

HBA configuration

• Host 1 is a single path HBA.
• Host 2 is a dual HBA host with multipathing software.
See Figure 34.

Risks

• Single path failure may result in data loss or disk corruption.
NOTE:
For additional risks, see "Linux" on page 77.

Limitations

• HP Continuous Access EVA is not supported with single path configurations.
• Single HBA path at the host server is not part of a cluster, unless in a Linux High Availability Cluster.
• Booting from the SAN is supported on single path HBA servers.
68 Single path implementation