Working With Sfps And Fiber-Optic Cables; Setting The Server Id - IBM TotalStorage DS4300 Installation, User's, And Maintenance Manual

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Working with SFPs and fiber-optic cables

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IBM TotalStorage DS4300 Fibre Channel Storage Subsystem: Installation, User's, and Maintenance Guide
Server ID Switch
Figure 16. Setting the Server ID
Server ID switch settings set the server ID to a value from 00 - 77. Server ID switch
X1 is for setting the ones position, and Server ID switch X10 is for setting the tens
position. The settings of the two server ID switches, when used together, provide a
two-digit ID of the server unit. The storage-management software uses the server
ID to provide a correlation between the storage-management graphics and the
physical storage unit. The ID indicates which physical unit corresponds to the
storage-management software status.
Use Server ID switches X10 and X1 to set the server-unit ID to any value from 00
through 77.
Note: Each server unit should have a unique ID if it is going to be connected to
other DS4000 EXP storage expansion enclosures through the storage
expansion enclosure loop ports. The Server ID setting is only valid for the
drive loop. The amber Conflict LED (located on the right-side of the switch)
will be lit if there is another unit in the drive loop that has the same ID setting
as the server ID. See your storage subsystem documentation for more
information.
Each RAID controller CRU contains ports for SFP modules that connect to the
fiber-optic cables. Two of the SFP ports are for host server attachment. On the
DS4300 Model 60U/60X, each RAID controller also has an additional port that
connects DS4000 EXP storage expansion enclosures to the storage subsystem.