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Pass-through disks appear as raw disks and offline to the parent.
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If snapshots are required, remember that pass-through disks do not support Hyper-V snapshot copies.
iSCSI Storage Deployment
The Hyper-V architecture offers two methods for deploying iSCSI storage disks on 2000 family storage
systems: direction connection and dual connection to the child partition. iSCSI ports must be configured to the
Hyper-V host to access LUs on 2000 family storage systems.
iSCSI Port Settings
Hyper-V servers that access iSCSI LUs on 2000 family storage systems must be properly zoned so that the
appropriate Hyper-V parent and child partitions can access the storage. With the 2000 family, zoning at the
storage level is accomplished by using HSDs. Zoning defines which LUs a particular Hyper-V server can
access. Hitachi Data Systems recommends creating an HSD group for each Hyper-V server and using the
name of the Hyper-V server in the HSD for documentation purposes.
Direct Connection
One iSCSI deployment method is a direct connection to the 2000 family storage system from the child partition.
The child partition must support the Microsoft iSCSI software initiator and must have the correct device driver.
Figure 5 shows a direct connection configuration. Notice that the child partition simply boots from the VHD on
the Hyper-V parent partition. The storage system has no external LU to contain the configuration files, OS
binaries or application libraries.
Figure 5. iSCSI Direct Connection to Child Partition
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