Setup guide

10-66
EPC Connecting Guide
Examples of Use
Point-to-point Connection
One port of a Symmetrix box is connected to an Escala server through a single adapter
(either Ultra Wide Differential SCSI or Fibre Channel). As there is no redundancy of any
component on the link, a single failure (cable, adapter, Channel Director) may cause the
loss of all data.
Figure 122. Point- to-point connection of an EMC
2
Symmetrix subsystem
For a Fast or Ultra Wide Differential connection (on both Escala MCA and PCI servers), the
maximum cable length is 25 meters.
For a Fibre Channel connection, the maximum cable length is 500 meters with a multimode
50 mm fiber optic. An MIA is plugged on the Emulex PCI adapter.
Multiple Connection
One Symmetrix subsystem is connected to an Escala server through two or more channels
(SCSI and/or Fibre Channel).
Each adapter drives separate data volumes with the advantage of adding bandwidth for
data transfers. There is no constraint on where the links are connected; they can be
plugged on the same Channel Director.