Not a chance I'd be willing to take. While it might work, I prefer to work under the premise of "Never force a protective feature". In this case, you are depending on all the load to switch from one channel to another when you disconnect from the current port. There is a chance for the momentary 'failover' to the single path to fail and bring a loop down completely, and I personally would not be willing to risk bringing down a production system.
-----Original Message----- From: owner-toasters@mathworks.com [mailto:owner-toasters@mathworks.com] On Behalf Of Paul Letta Sent: Friday, June 04, 2010 7:21 AM To: toasters@mathworks.com Subject: Moving dual attached disk loops from one adapter to another -- HOT ??
Hello,
I've got 2 disk loops, both are dual attached. I've got 2 unused, dual port FC cards in slots 3 and 4. The cards/slots are listed as good for disks on the hardware guide. This is for a FAS3040, running 7.2.6.1.
Loop 1 is attached to port 0a and 0c. Loop 2 is attached to port 0b and 0d.
Can I do the following hot with no down time?
1) Unplug loop1 from 0a and plug it into 3a 2) Unplug loop1 from 0c and plug it into 4a 3) Unplug loop 2 from 0b and plug it into 3b 4) Unplug loop 2 from 0d and plug it into 4b
I would wait after each step and verify that the disks are visible via both adapters with a sysconfig -a before moving on to the next step.
I did open a support case with the exact text above. But all I got was a very non-technical answer:
In rare cases it can be done... but it always has potential for problems. I will say :"NO" to your question, It is not a good idea to do it "HOT". It would be better to schedule a time when you can have a maintenance window (there will be downtime).
I can wait for an off peak time to try this. But I would rather not take the filer down to do it cold if there is a chance I can do it hot.
Thanks, Paul