Recommended Configuration File Parameters For The Emulex Lp9002L Adapter - IBM TotalStorage DS6000 Attachment Manual

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Table 1. Recommended configuration file parameters for the Emulex LP9002L adapter
Parameters Recommended settings
automap 1: Default. SCSI IDs for all FCP nodes without persistent bindings are
automatically generated. If new FCP devices are added to the network
when the system is down, there is no guarantee that these SCSI IDs
will remain the same when the system is restarted. If one of the FCP
binding methods is specified, then automap devices use the same
mapping method to preserve SCSI IDs between link down and link up. If
no bindings are specified, a value of 1 forces WWNN binding, a value of
2 forces WWPN binding, and a value of 3 forces DID binding. If
automap is 0, only devices with persistent bindings are recognized by
the system.
fcp-on 1: Default. Turn on FCP.
lun-queue-depth 30: The default value that the driver uses to limit the number of
outstanding commands per FCP LUN. This value is global, affecting
each LUN recognized by the driver, but can be overridden on a per-LUN
basis. You might have to configure RAID using the per-LUN tunable
throttles.
no-device-delay 0: Default. Implies no delay whatsoever.
1: Recommended.
2: Setting a long delay value might permit I/O operations to build up,
each with a pending time-out, which could result in the exhaustion of
critical PRIMEPOWER kernel resources. In this case, you might see a
fatal message such as, PANIC: Timeout table overflow.
network-on 0: Default. Recommended for fabric. Do not turn on IP networking.
1: Turn on IP networking.
scan-down 0: Recommended. Causes the driver to use an inverted ALPA map,
effectively scanning ALPAs from high to low as specified in the FC-AL
annex.
2: Arbitrated loop topology.
tgt-queue-depth 0: Recommended. The default value that the driver uses to limit the
number of outstanding commands per FCP target. This value is global,
affecting each target recognized by the driver, but can be overridden on
a per-target basis. You might have to configure RAID using the
per-target tunable throttles.
topology 2: Recommended for fabric. Point-to-point topology only.
4: Recommended for nonfabric. Arbitrated-loop topology only.
xmt-que-size 256: Default. Size of the transmit queue for mbufs (128 - 10240).
zone-rscn 0: Default.
1: Recommended for fabric. Check the name server for RSCNs.
Setting zone-rscn to 1 causes the driver to check with the name server
to see if an N_Port ID received from an RSCN applies. If soft zoning is
used with Brocade fabrics, this parameter should be set to 1.
Chapter 3. Attaching to a Fujitsu PRIMEPOWER host system
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