Hyper-V guest unresponsive while fixed vhdx gets expanded on iSCSI array

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hyper-v 2012 r2 cluster, dell md3600i storage array, iscsi connections redundant via dual 10gb nics & mpio in servers & in array.

vhdx removed vm & added, before apply set expand

resize fixed vhdx ie 250gb (all data gets written array) host not affected (still can red/write array directly), guest disk belongs becomes unresponsive.

any idea how tackle slowness?

obviosly 1 make expansion out of hours.

seb

please provide details of steps used expand disk.  process quick process.

tim



Windows Server  >  Hyper-V



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