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Risks

• Single path failure may result in data loss or disk corruption.

NOTE: For additional risks, see Table 63 (page 161).

Limitations

• HP P6000 Continuous Access is not supported with single path configurations.

• Single path HBA server is not part of a cluster.

• Booting from the SAN is supported on single path HBA servers.

Figure 59 VMware configuration

5 SAN switch 11 Network interconnection

6 SAN switch 22 Single HBA server

7 Controller A3 Dual HBA server

8 Controller B4 Management server

Failure scenarios

HP-UX

Table 57 HP-UX failure scenarios

Failure effectFault stimulus

Extremely critical event on UNIX. Can cause loss of system disk.Server failure (host power-cycled)

Short term: Data transfer stops. Possible I/O errors.

Long term: Job hangs, cannot umount disk, fsck failed, disk corrupted,

need mkfs disk.

Switch failure (SAN switch disabled)

Short term: Data transfer stops. Possible I/O errors.

Long term: Job hangs, cannot umount disk, fsck failed, disk corrupted,

need mkfs disk.

Controller failure

Short term: Data transfer stops. Possible I/O errors.

Long term: Job hangs, cannot umount disk, fsck failed, disk corrupted,

need mkfs disk.

Controller restart

158 Single Path Implementation

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HP 4100 Enterprise Virtual Array Manual do Utilizador Página 158