topic Re: MSA 2012 Failover in Disk Enclosures

MSA 2012 Failover

david kinsella_1 — Wed, 19 Nov 2008 16:15:34 GMT

HI,

I have an MSA (SAS) connected to a DL380G5 with 2 HBA cards in the server. Card 1 goes to controller A and card 2 goes to controller B in the MSA.

There are 12 disks in the MSA and I have created 4 vdisks. Two vdisks are mapped to one HBA and the other 2 are mapped to the other HBA. Each controller is responsible to 2 volumes each. I can see the disks in Windows and all is well.

What happens if controller A fails, will controller B take over the 2 volumes it is not currently responsible for?

What happens if one of the HBA cards fails in the server? Will the other HBA take over?

Re: MSA 2012 Failover

RM782 — Thu, 20 Nov 2008 10:36:47 GMT

Hi David

if you have the DSM loaded then yes.

http://www.hp.com/go/msa

select product and download HP MSA2000 MPIO DSM package

to manage DSM it uses a cli called dsmcli

to run from windows start menu or command line propmt:
c:\program files\Hewlett-Parckard\HPMPIO DSM\MSA2000
enter command dsmcli

commands are
-devinfo
-clear
-help
-pathinfo
-policies
-primary
-weight
-mpiolist
-pgr

hope that helps

Re: MSA 2012 Failover

david kinsella_1 — Fri, 21 Nov 2008 19:42:30 GMT

Thanks for the input. I have installed this and it says that it is using roundrobin.

Am I correct in saying that if a HBA fails the data will travel across the other HBA in the server?