HP 6400/8400 HP StorageWorks 6400/8400 Enterprise Virtual Array User Guide - Page 127

Risks, Limitations, Failure scenarios, HP-UX

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Risks • Single path failure may result in data loss or disk corruption. NOTE: For additional risks, see "VMware failure scenarios" (page 130). 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 40 VMware configuration 1 Network interconnection 2 Single HBA server 3 Dual HBA server 4 Management server Failure scenarios HP-UX Table 29 HP-UX failure scenarios Fault stimulus Server failure (host power-cycled) Switch failure (SAN switch disabled) 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. Failure scenarios 127

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Risks
•
Single path failure may result in data loss or disk corruption.
NOTE:
For additional risks, see
“VMware failure scenarios” (page 130)
.
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 40 VMware configuration
5 SAN switch 1
1 Network interconnection
6 SAN switch 2
2 Single HBA server
7 Controller A
3 Dual HBA server
8 Controller B
4 Management server
Failure scenarios
HP-UX
Table 29 HP-UX failure scenarios
Failure effect
Fault 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)
Failure scenarios
127