User guide

Table Of Contents
Hewlett-Packard SCSI-Fibre Channel Router Installation and User Guide
Revision 2.1.0 Page
2
1.2.1 Distance Solution
When used with the HP e3000 platform the SCSI-FC Router may be configured as a distance
solution. By converting SCSI to Fibre Channel, this configuration can provide lengths of 30m (98
ft) to 10 km (6.2 miles)
depending on the fiber optic cable used.
In a distance solution, there are two SCSI-FC Routers in a single Fibre Channel loop, each being
defined by its position within the loop. The first is directly attached to the host (server) and is
referred to as the ‘host router’. The other SCSI-FC Router is directly connected to the SCSI
devices (disk or tape drives) and is known as the ‘device router’. The host router and the device
router thus form a ‘1-to1’ router relationship.
As is shown in Figure 1-2, SCSI-FC Routers as a Distance Solution, the connection between the
host router and the host and the connection between the device router and the target devices are
both SCSI connections. The connection between the two routers, however, is maintained with
Fibre Channel. This permits the host to be at a much greater distance from the target devices than
if they were connected directly to one another via a SCSI connection.
Figure 1-2. SCSI-FC Routers as a Distance Solution
1.2.2 SCSI-Fibre Channel Connectivity
The SCSI-FC Router can also be used as a connectivity device that allows SCSI hosts to
interoperate with FC storage loops. This option is available with the HP e3000, HP 9000 and
Windows NT host platforms.
When the SCSI-FC Router is used in this manner, there is only a single router used in the storage
loop. As is shown in Figure 1-3, SCSI-FC Router as a Connectivity Device, the connection
between the router and the host is a SCSI connection. The connection between the router,
however, and the target devices is maintained with Fibre Channel.
Figure 1-3. SCSI-FC Router as a Connectivity Device
Disk Array
Device Router
Fibre Channel
Host Router
SCSI
SCSI
Host Server
Optical Cable
Host Router
Host Server
SCSI
Fibre Channel
XP family or VA family
of storage