From Microsoft: Microsoft iSCSI Software Target 3.3 provides storage (disks) over a TCP/IP network. It turns a computer running Windows Server into a storage device which provides shared block storage. You can use Microsoft iSCSI Software Target 3.3 to perform a variety of storage-related tasks, provide shared storage for Hyper-V to enable high availability and live migration, consolidate storage for multiple application servers, provide shared storage for applications hosted on a Windows fail-over cluster, and enable diskless computers to boot remotely from a single operating system image using iSCSI. Microsoft iSCSI Software Target 3.3 is an economical solution suited for a development or test environment and a small, medium, or branch office production environment. It enables storage consolidation and sharing on a Windows Server by implementing the iSCSI (Internet Small Computer Systems Interface) protocol, which supports SCSI-block access to a storage device over a TCP/IP network.
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