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тАО12-06-2005 01:13 AM
тАО12-06-2005 01:13 AM
How to manually failover path to SAN-disk in Tru64 5.1-B?
Is it possible to manually failover a path to HSG80 LUN from Tru64? The reason why is that I want to balance the IO between both of the HSG80-controllers.
Regards
Terje S├╕reide
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тАО12-06-2005 01:59 AM
тАО12-06-2005 01:59 AM
Re: How to manually failover path to SAN-disk in Tru64 5.1-B?
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тАО12-06-2005 02:02 AM
тАО12-06-2005 02:02 AM
Re: How to manually failover path to SAN-disk in Tru64 5.1-B?
Please ignore.
Al
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тАО12-06-2005 09:21 AM
тАО12-06-2005 09:21 AM
Re: How to manually failover path to SAN-disk in Tru64 5.1-B?
No intervention is necessary. Once the extra paths are needed, they are used. If you are watching each path, you may see that only one path is being used (with light IO). Crank up the IO and you should see it using more paths.
The beauty of Tru64 multipathing is that you don't have to do anything except have valid paths. :)
Greg
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тАО12-06-2005 06:32 PM
тАО12-06-2005 06:32 PM
Re: How to manually failover path to SAN-disk in Tru64 5.1-B?
I agree that Tru64 is a beautiful OS, but the reason why I want to manually relocate the path is that I have a heavily loaded HSG80 controller, and therefore I want to balance the IO more evenly between the two of them. The only way I so far know this can be done is to set the lun preferred path to the other controller and restart the controller with the active path. The drawback with this method is that all other luns will failover to and there is no automatic failback mechanism in Tru64 or HSG80 as far as I know.
Regards
Terje
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тАО12-06-2005 07:25 PM
тАО12-06-2005 07:25 PM
Re: How to manually failover path to SAN-disk in Tru64 5.1-B?
# scu
scu> set nexus bus 5 target 2 lun 3
...
scu> start
scu> quit
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тАО12-06-2005 10:02 PM
тАО12-06-2005 10:02 PM
Re: How to manually failover path to SAN-disk in Tru64 5.1-B?
The commands
scu>set nexus bus 4 target 0 bus lun 1
scu>start
should relocate lun 1 to the controller on bus 4 but I dont know which of the two paths seen from this controller the lun relocates to. So perhaps the lun in my case relocated to the same HSG80-controller.
Terje