Special Considerations For Failed Paths; Rebooting With A Failed Primary Path - HP e3000 MPE/iX Manual

Recovering From a Failover
Special Considerations

Special Considerations for Failed Paths

HAFO is not active until the late in the MPE/iX system boot sequence (ISL>
START). When the system boots, it first configures devices on the Primary path
(according to SYSGEN io>), Then it mounts all disk volumes using ONLY the
primary path. After volumes are mounted MPE attempts to validate the HAFO
configuration.
This means that if a primary path is broken, the Ldevs on that path WILL NOT
MOUNT, and will not be available for access after the system is up. HAFO
Validation errors will be printed on your system console in this case.

Rebooting With a Failed Primary Path

In order to mount these Ldevs when their primary path is broken, the user must
use the io> section of SYSGEN (NOT the ha> section) to specify the
alternate path as the actual path for these Ldevs. The system must then be
rebooted.
Consider the following sample output from the HASTAT command:
:HASTAT
High Availability Failover Device Status
Ldev Primary Path
===== ==================== ================== =============== ===============
350 0/4/0/0.70954.23
351 0/4/0/0.70954.24
352 0/6/0/0.73289.25
353 0/6/0/0.73289.26
450 0/6/2/1.3.3
451 0/6/2/1.3.4
452 0/6/2/0.3.5
453 0/6/2/0.3.6
If there were an array failure on the path for Ldev 351, the output of the
HASTAT command would be as follows:
High Availability Failover Device Status
Ldev Primary Path
===== ==================== ================== =============== ===============
350 0/4/0/0.70954.23
351 0/4/0/0.70954.24
352 0/6/0/0.73289.25
353 0/6/0/0.73289.26
44
Alternate Path
0/6/0/0.73289
0/6/0/0.73289
0/4/0/0.70954
0/4/0/0.70954
0/6/2/0
0/6/2/0
0/6/2/1
0/6/2/1
Alternate Path
0/6/0/0.73289
0/6/0/0.73289
0/4/0/0.70954
0/4/0/0.70954
Pri. Status Alt. Status
Ready Validated
Ready Validated
Ready Validated
Ready Validated
Ready Validated
Timeout/No Reply Ready
Ready Validated
Ready Validated
Pri. Status Alt. Status
Ready Validated
Array Failure Ready
Ready Validated
Ready Validated