HP EVA P6550 HP P6300/P6500 EVA User Guide (5697-2486, September 2013) - Page 17

Unit identification (UID) button The unit identification (UID) button helps locate an enclosure and its components. When the UID button is activated, the UID on the front and rear of the enclosure are illuminated. NOTE: A remote session from the management utility can also illuminate the UID. • To turn on the UID light, press the UID button. The UID light on the front and the rear of the enclosure will illuminate solid blue. (The UID on cascaded storage enclosures are not illuminated.) • To turn off an illuminated UID light, press the UID button. The UID light on the front and the rear of the enclosure will turn off. Power supply module Two power supplies provide the necessary operating voltages to all controller enclosure components. If one power supply fails, the remaining power supply is capable of operating the enclosure. (Replace any failed component as soon as possible.) NOTE: If one of the two power supply modules fails, it can be hot-replaced. Power supply LED One LED provides module status information. LED status Off On Description No power Normal, no fault conditions Fan module Fan modules provide cooling necessary to maintain proper operating temperature within the disk enclosure. If one fan fails, the remaining fan is capable of cooling the enclosure. (Replace any failed component as soon as possible.) NOTE: If one of the two fan modules fail, it can be hot-replaced. SAS disk enclosures 17