HP StorageWorks Fabric OS 5.0.0 Diagnostics and System Error Messages Reference Guide (AA-RW1SA-TE, May 2005)

42 Introduction to system messages
MQ Message queues are used for interprocess communication.
Message queues allow many messages, each of variable
length, to be queued. Any process or Interrupt Service
Routine (ISR) can write messages to a message queue. Any
process can read messages from a message queue.
MS The Management Service enables the user to obtain
information about the Fibre Channel fabric topology and
attributes by providing a single management access point.
MS provides for both monitoring and control of the
following areas:
• Fabric Configuration Server, which provides for the
configuration management of the fabric.
• Unzoned Name Server, which provides access to Name
Server information that is not subject to zone constraints.
• Fabric Zone Server, which provides access to and
control of zone information.
NBFS NBFSM is a part of the FSPF protocol that handles a
neighboring or adjacent switch’s Finite State Machine
(FSM).
Input to the FSM changes the local switch from one state to
another, based on specific events. For example, when two
switches are connected to each other using an interswitch
link (ISL) cable, they are in the Init state. After both switches
receive HELLO messages, they move to the Database
Exchange state, and so on.
NBFSM states are Down (0), Init (1), Database Exchange
(2), Database Acknowledge Wait (3), Database Wait (4),
and Full (5).
NS Indicates problems with the Simple Name Server module.
PDM Parity data manager is a user space daemon responsible
for the replication of persistent configuration files from the
primary partition to the secondary partition and from the
active CP blade to the standby CP blade.
PDTR These messages indicate that panic dump trace files have
been created.
PORT PORT error messages refer to the front-end user ports on the
switch. Front-end user ports are directly accessible by users
to connect end devices or to connect to other switches.
Table 5 System module descriptions (continued)
System module Description