HP 6100 HP 4x00/6x00/8x00 Enterprise Virtual Array User Guide (5697-0733, Marc - Page 163
HBA configuration, Risks, Limitations, Failure scenarios, HP-UX
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HBA configuration • Host 1 is a single path HBA. • Host 2 is a dual HBA host with multi-pathing software. See Figure 59 (page 163). Risks • Single path failure may result in data loss or disk corruption. NOTE: For additional risks, see Table 63 (page 166). Limitations • HP Continuous Access EVA 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 1 Network interconnection 2 Single HBA server 3 Dual HBA server 4 Management server Failure scenarios HP-UX Table 57 HP-UX failure scenarios Fault stimulus Server failure (host power-cycled) Switch failure (SAN switch disabled) Controller failure 5 SAN switch 1 6 SAN switch 2 7 Controller A 8 Controller B Failure effect Extremely critical event on UNIX. Can cause loss of system disk. Short term: Data transfer stops. Possible I/O errors. Long term: Job hangs, cannot umount disk, fsck failed, disk corrupted, need mkfs disk. Short term: Data transfer stops. Possible I/O errors. Long term: Job hangs, cannot umount disk, fsck failed, disk corrupted, need mkfs disk. Failure scenarios 163