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21115
January 5th, 2011 12:00
Multiple server groups acessing a single virtual disk on MD3000i
I must be missing something fairly elementary... but here's what I'm trying to do:
I have a number of VMware ESX servers accessing a common MD3000i which has a number of virtual disks. I have a couple cases where I have multiple server groups that need to access a single virtual disk. I either need to find a way to define that multiple server groups can access a single virtual disk, or find a way to put a particular server into multiple server groups (and thus I can only define the single server group that needs to access the virtual disk).
Any thoughts on how this can be done?
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Dev Mgr
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January 5th, 2011 21:00
You can't really do what you are wanting to do.
The only option is to create a single host-group and put all servers in question in the group. Then you can map the virtual disks to that group so that all those servers can see the same disks.
ccudmore
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January 6th, 2011 06:00
That's what I was afraid of. The problem is that there are other virtual disks in the SAN and various groups of servers have access to only certain virtual disks. So having one big host group doesn't work.
Dev Mgr
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January 6th, 2011 13:00
From the Dell offerings, Dell|EMC and Equallogic both can do what you want, but not the MD SANs (MD3000, 3000i, 3200, 3200i, etc).
Dev Mgr
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January 7th, 2011 13:00
From what I've seen a host can only exist in a single host group at a time and you cannot stack hostgroups.
You can however assign some LUNs (virtual disks) to just a single host that is in a hostgroup and then also assign one or more LUNs to the hostgroup.
mrokkam
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January 7th, 2011 13:00
I thought you can create multiple host groups reusing servers but I am not sure. You can always map virtual disks to either the host or the host group giving some flexibility in how you want to assign VDs around. This can help accomplish some of what you want to do.