Why does the "ball" disappear on reboot (hyper-v + iscsi)?

Question

Windows

win srv2012 hyper-v, a virtual machine with srv2008 (or win 7) was raised, a space from dell md3800i was connected through the initiator. And, accordingly, folders were created on it and shared. After rebooting the virtual machine, sharing disappears as if it never existed
. This does not happen on a physical machine. Where to dig?
thank you for reading ^^

Answer 1

Alternatively, iSCSI can be connected to the hypervisor itself, and connected to the VM as a disk.