HP StorageWorks 8/20q Fibre Channel Switch Installation and Reference Guide 9
Maintenance button
The Maintenance button (Figure 2) is a dual-function momentary switch on the front panel. Its purpose is to
reset the switch or to place the switch in maintenance mode. Maintenance mode sets the IP address to
10.0.0.1 and provides access to the switch for maintenance purposes when flash memory or the resident
configuration file is corrupted. For more information, see ”Recovering a switch using maintenance mode”
(page 55).
Resetting a switch
To reset the switch, press and hold the Maintenance button with a pointed tool for less than two seconds.
The switch responds as follows:
• All the switch LEDs illuminate except the System Fault LED.
• After approximately one minute, the power-on self test (POST) begins, extinguishing the Heartbeat LED.
• When the POST finishes, the Input Power LED illuminates and the Heartbeat LED flashes once per
second.
Placing the switch in maintenance mode
To place the switch in maintenance mode:
1. Isolate the switch from the fabric.
2. Press and hold the Maintenance button with a pointed tool for a few seconds until only the Heartbeat
LED (Figure 2) is illuminated. Continue holding the maintenance button until the Heartbeat LED goes
off, then release the button. The Heartbeat LED illuminates continuously while the switch is in
maintenance mode.
To exit maintenance mode and return to normal operation, press and release the Maintenance button
momentarily to reset the switch.
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