User`s guide

48 Implementing an Open IBM SAN
3. Either you or an IBM SSR defines the Fiber Channel port configuration if you
did not do it during the installation of the ESS or Fibre Channel adapters.
You or an IBM SSR configures the host system for the ESS by using the
instructions in your host system publications.
1.10.2 Installing the QLogic QLA2100F adapter card
This section tells you how to attach an ESS to a Windows NT host system with
the QLogic QLA2100F adapter card. Single-port Fibre Channel interfaces with
the QLogic QLA2100F adapter card support the following loop modes:
򐂰 Tar ge t
򐂰 Initiator
򐂰 Target and initiator
Note: Use the information on the logical configuration work sheet in the IBM
Enterprise Storage Server Configuration Planner that you should have
previously filled out.
Notes:
1. The IBM Subsystem Device Driver 1.2.1 supports the Windows NT 4.0
host system in a clustering environment. To have failover protection on an
open system, the IBM Subsystem Device Driver requires a minimum of two
Fibre Channel adapters. The maximum number of Fibre Channel adapters
supported is 16 for a total of 16 Fibre Channel ports.
2. To improve performance, IBM recommends that you map to the LUNs for
the target volumes of the Windows NT host until you need access to the
data on the target volume. Perform the LUN mapping after the PPRC
operation and immediately before you need access to the data. You must
restart the host system before you can access the data on the target
volume. You can greatly reduce the time it takes for the host system to
restart if you perform the LUN mapping. Otherwise, the time to reboot could
take 10 minutes per PPRC target volume.
Notes:
1. The arbitrated loop topology is the only topology available for the QLogic
QLA2100F adapter card.
2. When you install the QLA2100F adapter card on your host system, IBM
recommends that you install the card on a host system with four
processors. This ensures that you do not have a problem when you start
the host system.