McDATA manual UltraNet Edge 3000 Specific, Fibre Channel Tape Only LUN Mapping

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

10

Fibre Channel

Tape Only

LUN Mapping

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.

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.

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.

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.

FC/SCSI Tape Pipelining 10-3