Extending the size of an iSCSI based Cluster Shared Volume (CSV) in Windows Server 2012

I just had to expand the size of one of our CSV’s without much notice. I wasn’t prepared for this, but I knew two things: The iSCSI LUN had to grow The Virtual Disk inside Windows also had to grow. Our Hyper-V cluster contains three virtual disks: Volume1, Quorum Witness, and Volume2. Volume1 = 1TB Volume2 = 1TB Volume 2 filled up. Only 11GB free. Not okay. 1. Expand the iSCSI LUN size There’s a Synology backing this cluster. I didn’t do any documentation of expanding the iSCSI LUN because…

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