McDATA ULTRANETTM EDGE STORAGE ROUTER 3000 - Manual (Page 259)

10
FC/SCSI Tape Pipelining 10-3
UltraNet Edge 3000 Specific
not get corrupted. For more information, see the Fibre Channel End to
End CRC section in Chapter 3, Network Design Criteria .
UltraNet Edge 3000 Specific
The UltraNet Edge 3000’s implementation of FC/SCSI Tape
Pipelining differs slightly from similar channel and device extension
implementations in earlier McDATA products such as the UltraNet
Storage Director and CHANNELink. These differences are described
below.
Fibre Channel First, the UltraNet Edge 3000 implementation is Fibre Channel based,
rather than ESCON or SCSI based. This offers the opportunity to take
advantage of pipelining’s benefits with both the newer native Fibre
Channel tape drives as well as older SCSI drives, using a SCSI to
Fibre Channel bridge.
The UltraNet Edge 3000’s FC/SCSI Tape Pipelining implementation
configures the Fibre Channel port on the UltraNet Edge 3000 as an
N_port or NL_port, allowing direct connections to Fibre Channel
F_ports and FL_Ports (Fibre Channel switches) or Fibre Channel
N_ports or NL_ports (Fibre Channel HBAs). When configured for
FC/SCSI Tape Pipelining, the UltraNet Edge 3000 will not connect as
an E_port and will not extend the switch fabric.
Tape Only Although disk extension is also provided in the UltraNet Storage
Director and Channelink products, only tape extension will be
provided in the initial release of this feature on the UltraNet Edge
3000.
LUN Mapping The device attached UltraNet Edge 3000 (initiator) will dynamically
discover available targets and actively login/logout to those targets.
The Fibre Channel worldwide name (WWN) and the associated port
ids of each current logged-in target are forwarded to the associated
server attached UltraNet Edge 3000 (target).
The server attached to the UltraNet Edge 3000 will learn via the
device attached to the UltraNet Edge 3000’s target discovery, what
remote targets are available.