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02-04-2005 09:15 AM
02-04-2005 09:15 AM
We have recently installed new system which utilizes an MSA1000 Storageworks SAN storage system.
Two VMS (non-clustered) nodes are connected to the MSA1000 via an MSA-8 port switch.
The question is can a 3-node cluster be added to this configuration and share the disk storage system? The end result would be 1-3 node cluster and 2 other non-clustered nodes connected to the MSA1000 via the MSA-8 port switch.
One person is saying that this would violate VMS cluster security and another person thinks that it would not be a problem because the MSA1000 is a network device.
This isn't just idle conversation. We are putting a plan together to upgrade a cluster and are thinking that if this configuration would be "allowed", then we wouldn't need to purchase another disk controller. These systems share the same computer room but are running very different applications.
Actually, the clustered nodes run one application and the two stnd-alone nodes run one other application.
Any words of wisdom?
Solved! Go to Solution.
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02-04-2005 06:35 PM
02-04-2005 06:35 PM
SolutionIf it is set up properly it will not 'violate VMS cluster security' and it has nothing to do with the MSA1000 being a Storage Area 'Network' device.
The key to this is a feature called Selective Storage Presentation (SSP) which is used to control which server has access to which logical disk(s).
As you already have two non-clustered servers connected to the MSA1000, it is possible that SSP is already in place so that one server does not have access to the other server's disks. If not, it really should be done quick, because it is quite easy to mount or even initialize a wrong disk.
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02-04-2005 09:01 PM
02-04-2005 09:01 PM
Re: MSA1000 configuration question.
Of course the cluster and the non-clustered systems must NOT try to access each others disks! (other than via the node/cluster that owns such disk, eg, DECnet, or NSF)
Proost.
Have one on me.
Jan
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02-06-2005 08:42 AM
02-06-2005 08:42 AM
Re: MSA1000 configuration question.
Purely Personal Opinion
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02-08-2005 03:31 AM
02-08-2005 03:31 AM
Re: MSA1000 configuration question.
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02-08-2005 03:33 AM
02-08-2005 03:33 AM