HP 6400/8400 HP StorageWorks 6400/8400 Enterprise Virtual Array User Guide - Page 128

Windows Server, Oracle Solaris, Table 29 HP-UX failure scenarios

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Table 29 HP-UX failure scenarios (continued) Fault stimulus Failure effect 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 Short term: Data transfer stops. Possible I/O errors. Long term: Job hangs, cannot umount disk, fsck failed, disk corrupted, need mkfs disk. Server path failure Short term: Data transfer stops. Possible I/O errors. Long term: Job hangs, cannot umount disk, fsck failed, disk corrupted, need mkfs disk. Storage path failure Short term: Data transfer stops. Possible I/O errors. Long term: Job hangs, replace cable, I/O continues. Without cable replacement job must be aborted; disk seems error free. Windows Server Table 30 Windows Server failure scenarios Fault stimulus Server failure (host power-cycled) Switch failure (SAN switch disabled) Controller failure Controller restart Server path failure Storage path failure Failure effect OS runs a command called chkdsk when rebooting. Data lost, data that finished copying survived. Write delay, server hangs until I/O is cancelled or cold reboot. Write delay, server hangs or reboots. One controller failed, other controller and shelves critical, shelves offline. Volume not accessible. Server cold reboot, data lost. Check disk when rebooting. Controller momentarily in failed state, server keeps copying. All data copied, no interruption. Event error warning error detected during paging operation. Write delay, volume inaccessible. Host hangs and restarts. Write delay, volume disappears, server still running. When cables plugged back in, controller recovers, server finds volume, data loss. Oracle Solaris Table 31 Oracle Solaris failure scenarios Fault stimulus Server failure (host power-cycled) Switch failure (SAN switch disabled) Controller failure Controller restart Failure effect Check disk when rebooting. Data loss, data that finished copying survived. Short term: Data transfer stops. Possible I/O errors. Long term: Repeated error messages on console, no access to CDE. System reboot causes loss of data on disk. Must newfs disk. Short term: Data transfer stops. Possible I/O errors. Long term: Repeated error messages on console, no access to CDE. System reboot causes loss of data on disk. Must newfs disk. Short term: Data transfer stops. Possible I/O errors. Long term: Repeated error messages on console, no access to CDE. System reboot causes loss of data on disk. Must newfs disk. 128 Single Path Implementation

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Table 29 HP-UX failure scenarios
(continued)
Failure effect
Fault stimulus
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
Short term: Data transfer stops. Possible I/O errors.
Long term: Job hangs, cannot umount disk, fsck failed, disk corrupted,
need mkfs disk.
Server path failure
Short term: Data transfer stops. Possible I/O errors.
Long term: Job hangs, replace cable, I/O continues. Without cable
replacement job must be aborted; disk seems error free.
Storage path failure
Windows Server
Table 30 Windows Server failure scenarios
Failure effect
Fault stimulus
OS runs a command called chkdsk when rebooting. Data lost, data that
finished copying survived.
Server failure (host power-cycled)
Write delay, server hangs until I/O is cancelled or cold reboot.
Switch failure (SAN switch disabled)
Write delay, server hangs or reboots. One controller failed, other
controller and shelves critical, shelves offline. Volume not accessible.
Server cold reboot, data lost. Check disk when rebooting.
Controller failure
Controller momentarily in failed state, server keeps copying. All data
copied, no interruption. Event error warning error detected during paging
operation.
Controller restart
Write delay, volume inaccessible. Host hangs and restarts.
Server path failure
Write delay, volume disappears, server still running. When cables
plugged back in, controller recovers, server finds volume, data loss.
Storage path failure
Oracle Solaris
Table 31 Oracle Solaris failure scenarios
Failure effect
Fault stimulus
Check disk when rebooting. Data loss, data that finished copying survived.
Server failure (host power-cycled)
Short term: Data transfer stops. Possible I/O errors.
Long term: Repeated error messages on console, no access to CDE.
System reboot causes loss of data on disk. Must newfs disk.
Switch failure (SAN switch disabled)
Short term: Data transfer stops. Possible I/O errors.
Long term: Repeated error messages on console, no access to CDE.
System reboot causes loss of data on disk. Must newfs disk.
Controller failure
Short term: Data transfer stops. Possible I/O errors.
Long term: Repeated error messages on console, no access to CDE.
System reboot causes loss of data on disk. Must newfs disk.
Controller restart
128
Single Path Implementation