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+iSCSI is an IETF standard (RFC 3720) for remote access to block-level
+storage. It can be thought of as similar to NFS, except that an NFS
+server exports files; the iSCSI target exports blocks to the iSCSI
+initiators, which are the clients.
+
+To set up the target, you need to edit the /etc/iscsi/targets file.
+It has a certain layout, to provide a means of (a) mirroring and (b)
+combining multiple areas to present one large contiguous area of
+storage. This can be multiply-layered.