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need help testing hba and san failover on novell 6.5
- Thread starter etjones
- Start date
marvhuffaker
MIS
Testing failover on a SAN is one of the more complex subject matters. If you have no idea what you are doing with Novell, a forum posting is a bad idea. You need to get professional help from someone that knows.
Marvin Huffaker, MCNE
Marvin Huffaker, MCNE
- Thread starter
- #3
Ok… you are far too smart and busy.
For anyone else that can offer advice...
Have several Novell 6.5 servers that are configured with SAN disk (IBM SVC). Failover did not work during a SVC upgrade (switching from one node to another). Initial config was ...
(STARTUP.NCF)
LOAD SCSIHD.CDM
:
:
LOAD QL2X00.HAM SLOT=2 /LUNS
LOAD QL2X00.HAM SLOT=4 /LUNS
changed it to ...
LOAD SCSIHD.CDM AEN
:
:
LOAD QL2X00.HAM SLOT=2 /LUNS /MAXLUNS=64 /ALLPATHS /PORTNAMES
LOAD QL2X00.HAM SLOT=4 /LUNS /MAXLUNS=64 /ALLPATHS /PORTNAMES
SET MULTI-PATH SUPPORT=0N
And added to file AUTOEXEC.NCF ...
SCAN FOR NEW DEVICES
Both QLogic HBAs show up as devices during boot.
I’ve got the disk space mapped on a client machine and after rebooting the Novell server, changed dir to the mapped drive and wrote a new file and then proceeded to pull the cable out of the first hba. Went back to the client machine and wrote another new file. Plugged fiber cable into first hba and unplugged cable from second hba. Wrote yet another file on the mapped drive. Went back to mapped drive and wrote one more file. Did then reboot the Novell server.
Now although it looks like failover worked for this test, I know on another occasion (prior to startup and autoexec changes) failover did not work. In that case, databases were involved.
Do I need to do another type of test to really exercise failover? Also, where would I find boot logs?
Thanks for any info.
marvhuffaker
MIS
Don't get assy with me, you're the one you said you had no clue.
Marvin Huffaker, MCNE
Marvin Huffaker, MCNE
i'm not up on ibm's
you dont need to be rebooting netware servers when doing this .
this type of configs also need to be done through the agents
ie on hp through secure paths , a dell's through navisphere
god only knows on an ibm.
the agent will also show you the four paths - as each hba with have a connection to each of the two controllers.
popping a fibre will bounce a message on the server
you dont need to be rebooting netware servers when doing this .
this type of configs also need to be done through the agents
ie on hp through secure paths , a dell's through navisphere
god only knows on an ibm.
the agent will also show you the four paths - as each hba with have a connection to each of the two controllers.
popping a fibre will bounce a message on the server
You shouldn't have to reboot the server to test failover. If the failover doesn't work, the server is likely to reboot itself, anyway.
As for "exercising" the multipath, I'd do what you did: pull a fibre cable, shut off the FC switch, and reboot the SP. Simulating a card failure isn't really exact, but you could try unloading the driver for a slot.
You also might look at your SAN vendor's multipath support. I doubt that I'd trust Novell's built-in support. We use Powerpath here.
As for "exercising" the multipath, I'd do what you did: pull a fibre cable, shut off the FC switch, and reboot the SP. Simulating a card failure isn't really exact, but you could try unloading the driver for a slot.
You also might look at your SAN vendor's multipath support. I doubt that I'd trust Novell's built-in support. We use Powerpath here.
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