G-Technology G-RACK 12, User Manual, Page: 249 / 296

Troubleshooting
p. 249
Security - For Security purposes you will want to select a rack that allows for locking the front and
rear of the cabinet. Otherwise you should place the rack in a location that provides physical security
to the area.
Safety
•
Air temp. What air temperature should I place the unit at? Most data centers operate in a
temperature range between 68 and 72 degrees, and some are as cold as 55 degrees. Raising
the baseline temperature inside the data center – known as a set point – can save money spent
on air conditioning. You also need to make sure that air can flow inside the rack so the external
room cooling aides in cooling the rack and its devices.
• ESD. Do I need to use ESD protection when using the server? ESD protection is needed when
installing and servicing the server.
• What is ESD? Electrostatic discharge (ESD) is the sudden flow of electricity between two
electrically charged objects caused by contact, an electrical short, or dielectric breakdown. A
buildup of static electricity can be caused by electrostatic induction. In layman’s terms it is that
zap you get when not grounded.
• Grounding - What is grounding? In electrical engineering, ground or earth is the reference point
in an electrical circuit from which voltages are measured, a common return path for electric
current, or a direct physical connection to the Earth.
• Front handles. Can I pick the unit up by the front handles? No. The front handles are to be used
to slide the unit on rails after being properly installed. Pick the unit up by the handles can
damage you and the unit.
LED and Sensors
LED activity
•
Whole Unit - The HDD activity light indicates for the unit means one of the installed drives has
activity. In normal operation this light will blink or appear to be on solid during period of high
activity.
• Each drive also has an activity light indicating that single drive has activity. In the case of
swapping out a drive you will want to see no blinking before removing a disk drive. When
adding a new drive you will want to look for activity to see that synchronization has started.
• Network activity - What does the network activity light mean? When data is flowing on/ off
the server the light on the network activity LED will blink. There are also LEDs on the network
connector that indicate connection and activity.
• Power light just indicated the unit has power and is turned on.
Connectors, cables & buttons