Had this silly thing
happening over and over again for one of my VMs. It started something like this…
Each and every time
I rebooted my new Win 2012R2 host any disk other than the OS volume would
always show offline. Patched the host,
like a good Systems Engineer should, still no change.
Confirmed all VMWare
machine type was current. It was - and
yes this means I am using VMWare and my preferred Hyper-V - but that is another
story all together.
Then the light bulb
went off! This used to occur a good bit
in 2008 and 2008R2 when I was working heavily on customer systems. It could not be the same DISKPART setting
could it? Yes, yes it was.
DISKPART> SAN
SAN Policy : Offline
Shared
DISKPART>SAN
Policy=OnlineAll
So this solved my
issue for this single host which is not clustered. Yea me!
However I must
caution there is a reason why this is set this way. This is set this way by design from Microsoft
to protect shared disks from being accessed by multiple servers. Basically this is required for clustering as
the Cluster Filter driver and services will "own" this disk and the
volume on it. If you set this on a node
of a cluster you will corrupt data.
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