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тАО03-16-2005 07:04 AM
тАО03-16-2005 07:04 AM
I have recently upgraded an EVA to 3.020 VCS, and also securepath (3.0E) and platform kit (3.0E) No problems, but we are discussing the settings in secure path on the superdome, currently load balancing and auto restore are turned off. There are two paths to the EVA and wonder if this will improve performance if we set load balancing to on.
Solved! Go to Solution.
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тАО03-17-2005 02:05 AM
тАО03-17-2005 02:05 AM
Re: eva5000 connected to superdome
This manual ballance makes great performance increase....
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тАО03-17-2005 05:25 AM
тАО03-17-2005 05:25 AM
Re: eva5000 connected to superdome
By the way, if you have 2 HBAs connected to all four ports of the EVA you should see 4 paths.
If load balancing is off 1 path must be avtive, 1 path available and 2 pathes standby .
If Load balancing is on 2 pathes must be active and two standby.
If there are 2 HBAs installed and you do not see 4 paths, there is a problem.
Read more about it on http://h200005.www2.hp.com/bc/docs/support/SupportManual/c00248499/c00248499.pdf
Cheer
Peter
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тАО03-17-2005 07:50 AM
тАО03-17-2005 07:50 AM
Re: eva5000 connected to superdome
I will have a closer look at the config when I get back in - currently there are two superdome partitions connected via 2 brocade switches, each partition sees two paths to the vdisks, although these paths do not have drivers assigned, this occurs later on in the IOSCAN, instead of "real" addresses (I.E 0/0/10...) there are 255.255 addresses which have c37dxtx assigned. I will attach an IOSCAN tommorow to explain this.
I will read through the manual - it appears that the round-robin setting will alternate the paths.
Thanks for your advice
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тАО03-17-2005 10:47 PM
тАО03-17-2005 10:47 PM
Re: eva5000 connected to superdome
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тАО03-17-2005 11:59 PM
тАО03-17-2005 11:59 PM
Re: eva5000 connected to superdome
A single LUN belongs to one of the 2 EVA Controllers which presents it on both of its ports. In your case one port active the other available.
The other controller presents the same LUN on both ports as standby.
In case of a failure that needs the LUN to be moved to the other controller SecurePath will take care of it.
Cheers
Peter
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тАО03-18-2005 12:13 AM
тАО03-18-2005 12:13 AM
Re: eva5000 connected to superdome
I am new to EVA (have worked mainly with VA and XPs), normally on the array side of the solution, rather than the server side!
I will read the manual this weekend, and prepare for the change (I take it that the device files will not change, which would mean LVM rework?)
Regards - Robert
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тАО03-18-2005 12:33 AM
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тАО03-18-2005 12:44 AM
тАО03-18-2005 12:44 AM
Re: eva5000 connected to superdome
I am moving an XP512 from one site to another, plus some 9000 and MPE servers :(
Apart from that, I will be doing the garden!
Regards
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тАО03-18-2005 12:48 AM
тАО03-18-2005 12:48 AM