Special Considerations For Configuration; Rebooting After A Hafo Event; Corrupt Or Problem Hafoconf File; Updating From Mpe/Ix 6.5 To Mpe/Ix 7.0 Or 7.5 - HP e3000 MPE/iX Manual

Configuration
Special Considerations

Special Considerations for Configuration

Rebooting After a HAFO Event

Rebooting the system after a HAFO event has occurred, but before the primary
path is repaired is a special situation, especially if the event occurred on the path
for Ldev 1.
HAFO is not active until very late in the MPE/iX system boot process. Non-
MPE interfaces such as the system Boot Prompt (PDC) and ISL have no
knowledge of HAFO. The system always attempts to mount Ldev 1 based on the
PDC configured system primary path. If the system's primary boot path (Ldev
#1) is not repaired or changed, the system will not boot.
All other disk volumes are accessed based on the configuration of the Ldevs
done in the (io) section of SYSGEN. (i.e., NOT based on anything done in the
ha> section of SYSGEN.) If the primary path to any of the Ldevs is broken, then
those Ldevs will NOT mount at boot time and may NOT be available after the
system is up.
For information on how to deal with these types of situations, please see the
Special Considerations for Failed Paths section in Chapter 6, "Recovering From
a Failure."
All primary and alternate paths are validated near the end of the boot process. If
NOTE
any paths are broken, an error message will be issued.

Corrupt or Problem HAFOCONF File

If the HAFOCONF file becomes corrupt, there are two ways to deal with it. One
way to fix it is to purge the file and restore a good file from a backup. Another
way is to purge it, then enter SYSGEN. If there is no HAFOCONF file when
SYSGEN is entered, it will build a new (empty) one automatically. Use
to configure Ldevs for HAFO.
Do not perform HAFO configuration when a path is broken. No HAFO
configuration changes should be made unless all paths are functioning properly
and all Ldevs are operating on their primary path.

Updating from MPE/iX 6.5 to MPE/iX 7.0 or 7.5.

The structure of the HAFOCONF file used by the 7.0 & 7.5 version (supporting
Fibre Channel devices) has changed from that used by the 6.5 version (for use
with XP256 only). BEFORE UPDATING to 7.0 or 7.5, you should dump the
output of the SYSGEN ha> "
34
" to an ASCII file.
LISTCONF
ADDCONF