HP 6400/8400 HP StorageWorks 6400/8400 Enterprise Virtual Array User Guide - Page 130

IBM AIX, VMware, Table 33 Linux failure scenarios

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Table 33 Linux failure scenarios (continued) Fault stimulus Failure effect Controller failure Short term: I/O suspended, possible data loss. Long term: I/O halts with I/O errors, data loss. Cannot reload driver, need to reboot system, fsck should be run on any failed disks before remounting. Controller restart Short term: I/O suspended, possible data loss. Long term: I/O halts with I/O errors, data loss. Cannot reload driver, need to reboot system, fsck should be run on any failed disks before remounting. Server path failure Short: I/O suspended, possible data loss. Long: I/O halts with I/O errors, data loss. HBA driver must be reloaded before failed drives can be recovered, fsck should be run on any failed drives before remounting. Storage path failure Short: I/O suspended, possible data loss. Long: I/O halts with I/O errors, data loss. HBA driver must be reloaded before failed drives can be recovered, fsck should be run on any failed drives before remounting. IBM AIX Table 34 IBM AIX 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 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 in errpt output. System reboot causes loss of data on disk. Must crfs disk. Short term: Data transfer stops. Possible I/O errors. Long term: Repeated error messages in errpt output. System reboot causes loss of data on disk. Must crfs disk. Short term: Data transfer stops. Possible I/O errors. Long term: Repeated error messages in errpt output. System reboot causes loss of data on disk. Must crfs disk. Short term: Data transfer stops. Possible I/O errors. Long term: Repeated error messages in errpt output. System reboot causes loss of data on disk. Must crfs disk. Short term: Data transfer stops. Possible I/O errors. Long term: Repeated error messages in errpt output. System reboot causes loss of data on disk. Must crfs disk. VMware Table 35 VMware failure scenarios Fault stimulus Server failure (host power-cycled) Switch failure (SAN switch disabled) Failure effect OS reboots, automatically checks disks. HSV disks must be manually checked unless auto mounted by the system. Short: I/O suspended, possible data loss. Long: I/O halts with I/O errors, data loss. HBA driver must be reloaded before failed drives can be recovered, fsck should be run on any failed drives before remounting. 130 Single Path Implementation

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Table 33 Linux failure scenarios
(continued)
Failure effect
Fault stimulus
Short term: I/O suspended, possible data loss.
Long term: I/O halts with I/O errors, data loss. Cannot reload driver,
need to reboot system, fsck should be run on any failed disks before
remounting.
Controller failure
Short term: I/O suspended, possible data loss.
Long term: I/O halts with I/O errors, data loss. Cannot reload driver,
need to reboot system, fsck should be run on any failed disks before
remounting.
Controller restart
Short: I/O suspended, possible data loss.
Long: I/O halts with I/O errors, data loss. HBA driver must be reloaded
before failed drives can be recovered, fsck should be run on any failed
drives before remounting.
Server path failure
Short: I/O suspended, possible data loss.
Long: I/O halts with I/O errors, data loss. HBA driver must be reloaded
before failed drives can be recovered, fsck should be run on any failed
drives before remounting.
Storage path failure
IBM AIX
Table 34 IBM AIX 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 in errpt output. System reboot causes
loss of data on disk. Must crfs disk.
Switch failure (SAN switch disabled)
Short term: Data transfer stops. Possible I/O errors.
Long term: Repeated error messages in errpt output. System reboot causes
loss of data on disk. Must crfs disk.
Controller failure
Short term: Data transfer stops. Possible I/O errors.
Long term: Repeated error messages in errpt output. System reboot causes
loss of data on disk. Must crfs disk.
Controller restart
Short term: Data transfer stops. Possible I/O errors.
Long term: Repeated error messages in errpt output. System reboot causes
loss of data on disk. Must crfs disk.
Server path failure
Short term: Data transfer stops. Possible I/O errors.
Long term: Repeated error messages in errpt output. System reboot causes
loss of data on disk. Must crfs disk.
Storage path failure
VMware
Table 35 VMware failure scenarios
Failure effect
Fault stimulus
OS reboots, automatically checks disks. HSV disks must be manually
checked unless auto mounted by the system.
Server failure (host power-cycled)
Short: I/O suspended, possible data loss.
Long: I/O halts with I/O errors, data loss. HBA driver must be reloaded
before failed drives can be recovered, fsck should be run on any failed
drives before remounting.
Switch failure (SAN switch disabled)
130
Single Path Implementation