Openvms And Tru64 Unix; Linux - HP 6100 User Manual

OpenVMS and Tru64 UNIX

Table 60 OpenVMS and Tru64 UNIX failure scenarios
Fault stimulus
Server failure (host power-cycled)
Switch failure (SAN switch disabled)
Controller failure
Controller restart
Server path failure
Storage path failure

Linux

Table 61 Linux failure scenarios
Fault stimulus
Server failure (host power-cycled)
Switch failure (SAN switch disabled)
Controller failure
Controller restart
Failure effect
All I/O operations halted. Possible data loss from unfinished or unflushed
writes. File system check may be needed upon reboot.
OpenVMS—OS will report the volume in a Mount Verify state until the
MVTIMEOUT limit is exceeded, when it then marks the volume as Mount
Verify Timeout. No data is lost or corrupted.
Tru64 UNIX—All I/O operations halted. I/O errors are returned back to
the applications. An I/O failure to the system disk can cause the system
to panic. Possible data loss from unfinished or unflushed writes. File system
check may be needed upon reboot.
I/O fails over to the surviving path. No data is lost or corrupted.
OpenVMS—OS will report the volume in a Mount Verify state until the
MVTIMEOUT limit is exceeded, when it then marks the volume as Mount
Verify Timeout. No data is lost of corrupted.
Tru64 UNIX—I/O retried until controller back online. If maximum retries
exceeded, I/O fails over to the surviving path. No data is lost or
corrupted.
OpenVMS—OS will report the volume in a Mount Verify state until the
MVTIMEOUT limit is exceeded, when it then marks the volume as Mount
Verify Timeout. No data is lost or corrupted.
Tru64 UNIX—All I/O operations halted. I/O errors are returned back to
the applications. An I/O failure to the system disk can cause the system
to panic. Possible data loss from unfinished or unflushed writes. File system
check may be needed upon reboot.
OpenVMS—OS will report the volume in a Mount Verify state until the
MVTIMEOUT limit is exceeded, when it then marks the volume as Mount
Verify Timeout. No data is lost or corrupted.
Tru64 UNIX—I/O fails over to the surviving path. No data is lost or
corrupted.
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.
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.
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.
Failure scenarios 165