958-000284-007, March 2005)

ISL disconnect causes NOS error with the OpenVMS operating systems

When an ISL conne ction is physically removed between directors or switches, the Fibre

Channel Adapter m

odel FC A2354 transmits a Not Operational Sequence (NOS) error.

This is observed as an entr y in the HAFM appliance Link Incident log for the port in

which the FCA2354 is a ttached. The director’s Hardware View also displays a yellow

triangle icon ove

r the port that detected this incident. The fabric operation or data

movement is not d

isrupted by these incidents, and you can clear alerts from these

incidences using the following p rocedure.

Workaround

Use these steps to clear the incident alerts.

1. At the HAFM Hardware View,clicktheportmoduletoopenthePort Card

View.

2. Right-click on the port with the yellow triangle icon, and choose Clear Link

Incident Alert(s).

Support for speed Auto-Negotiate

Auto-negotiate is supported. However, HP recommends that the port speed for E_Por ts

(for Interswitch Links, or ISLs) be set to a specific port speed (1Gb/sec or 2Gb/sec,

as appropriate for the speed of the directors or edge switches being connected) instead

of to Negotiate. Using a specific port speed decreases the time for a fabric build

in response to some per turbation event in the fabric. Similarly, setting a specific port

speed for N_Ports also decreases fabric build time. However, setting a specific port

speedforN_Portsisnotrequired.

There are a few older HBA devices that do not always succeed in logging in to a switch

port when the port speed is set for auto-negotiate.

Workaround

If an older HBA has difficulty logging into a switch por t that has its port speed

configured as Negotiate, configure that port speed to 1Gb/sec or 2Gb/sec

according to the operation speed of the HBA connected to that por t.

Ports may accumulate spurious events

AportmayaccumulateInvalid transmission word and Bit-Error Threshold Link Incident

events when a transceiver is poorly seated, resulting in a poor ground connection.

HP StorageWorks Edge Switch release notes