Re: 2 Node SCSI problem

hi felix!

this feature is per design. you need to add the second node within the
cluster manager on the first node and then you can do the failover tests.
the second node need no read right to shared disks, it only needs access if
it owns the resources.

gerald aigenbauer.


"Felix" <felix.hoegerl@xxxxxxxxxx> schrieb im Newsbeitrag
news:1123140762.677249.246360@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
> hi there,
>
> after reading through a lot of info material on scsi and 2 node
> clusters using scsi, i tried to set up this kind of cluster in my
> test-environment.
>
> well, i used a special testing setup though:
>
> each node has a pci scsi adapter where the system disc is connected to.
> additionally each one has its onbaord scsi controller enabled.
>
> i connected the two onboard scsi controller with a scsi cable ->
> forming a scsi-bus (i know that both nodes must have power applied for
> the termination to work, thats ok).
>
> to this bus i attached a single scsi disc -> thats my shard scsi bus
> :-)
>
> the onbaord controllers have internal termination enabeld and the bus
> reset on IC is disabled.
>
> when i boot one node to windows (the other is in bios screen), i see
> the disc on the shared scsi bus and can partition it via the
> disk-manger.
> i reboot the first node and keep in in bios screen, then i boot the
> second one to windows. here i can see the disc as well, including the
> partition just created, fine so far.
>
> when both nodes are bootet to windows (btw, no cluster yet), both nodes
> see the disc, both nodes can write on disk, but what the one nodes
> writes, the other can't see. ok, no problem, we dont want that scenario
> anyway, we want a cluster, and there, only one node has exclusive
> access to the shared disc anyway (quorum).
>
> so i boot one node to bios, the other to windows and create the first
> node. works great, it finds the shared disc as quorum and starts up the
> cluster service.
>
> but when i boot the second node to windows, it tells me it cant access
> the quorum device. when i check the disc-manager, it says the shared
> disc is 'not readable'.
>
> i understand that this might be a problem/feature with the exclusive
> access for only one node, but how does the addition of nodes then work
> without at least readable access to the quorum?
>
> i am nbot sure if its a scsi-prob or windows prob.
>
> sorry for looong post though ;-)
>
> cheers
> felix hoegerl
>


.

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