NEC S2900 User Manual page 50

(4) Setting of switches
a) Setting of the ENC ID switch on disk enclosure
Set the ENC ID by using the ENC ID switch on each adapter.
Set the ENC ID so that it is not the same as that of another disk enclosure on the same FC
loop.
Set the ENC ID switches of both the adapters installed in the first FC disk enclosure
connected to the array controller via the FC cable (HSSDC-HSSDC) to "0". If additional FC
disk enclosures are added, set the ENC ID switches of the adapters installed in each
additional FC disk enclosure/SATA disk enclosure to "1", "2", or "3" in the connection order.
When the ENC ID switches of the left and right adapters are set differently, the FAULT LEDs
on the adapters flash and the disk enclosure is not started. If different values are set for the
ENC ID switches, turn off the power of the system including the disk enclosure, reset the
ENC ID values properly, and turn on the power again.
The outline of cable connections and the settings of ENC ID switches are shown on pages 31
and 32.
b) Setting of the AL-PA switch on the array controller
Setting the AL-PA switch is accomplished by using the maintenance PC.
Set the AL-PA switch so that it may not be the same as that of another FibreChannel device in
the same host FC loop.
See Appendix C for information regarding the usage and settings of the maintenance PC.
33