nbd-client 1:2.9.3-3 (i386 binary) in ubuntu gutsy

 This package contains the client process for the Network Block
 Device. The Network Block Device is a client/server protocol that
 emulates a block device (like a hard disk, a floppy, a CD-ROM, ...)
 over the network, thus giving the system the ability to swap over the
 network, or to use raw network diskspace for other purposes.
 .
 Note, however, that it is not recommended to write to a single
 networked block device from different clients simultaneously, since
 that would probably result in data loss; if you want different
 clients to use the same shared network resource, you don't need the
 Network Block Device (which, basically, is a Disk Server protocol)
 but something else, like Sun's Network File System (NFS), or CODA.