HP 8/20q HP StorageWorks 8/20q Fibre Channel Switch Installation and Reference - Page 9
Maintenance button, Resetting a switch, Placing the switch in maintenance mode
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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. HP StorageWorks 8/20q Fibre Channel Switch Installation and Reference Guide 9