Ultra-Dense Server Deployment in Racks

Compaq Ultra-Dense Server Deployment in Compaq Racks 10
128H-0400A-WWEN
1.2 Glossary
Note: For more detailed information about the products in this glossary, log on to the Internet at
www.compaq.com
1U – One rack unit (1U) is 1.75 inches or 44.45 mm in vertical dimension. The height of a device, or
form-factor, can be expressed in rack units (Us), for example 1U, 3U, 7U. The actual height of a
device is somewhat less. For example, while the ProLiant DL360 server is considered to be a 1U
server, its actual height is 1.65 inches. This slight reduction in height prevents mechanical
interference between two servers that are mounted in adjacent places in a rack.
Fixed-Rail – The fixed server rails are factory-installed in each ProLiant DL360 server. The matching
fixed rack rails shipped with the server are to be installed on Compaq 9000- and 7000-series racks.
The fixed rack rails are spring-loaded so that they can be installed easily by one person. When using
fixed rails, servicing of a ProLiant DL360 server requires disconnecting all cables from the server and
removing the server from the rack.
Flat Panel Display (FPD) – The Compaq TFT5000R (15-inch) Flat Panel
Monitor provides large viewable image size and exceptional screen
performance in a space saving 2U-form factor for rack usage, allowing the
monitor to be neatly tucked away when not in use.
Figure 1-1. Flat Panel Monitor (TFT5000R)
High Voltage – AC line voltage of 200V to 240V. Higher voltage level means lower current for the same
amount of power requirement for a server. Compaq recommends a high voltage source to support
high volume deployments of ProLiant DL360 servers in a rack.
In-Rack Keyboard – The 1U Rack Keyboard Drawer and the Internal
Keyboard with Trackball are designed to work together to save room in
space-constrained rack-mount environments. The 1U Keyboard Drawer
requires only half the Compaq rack depth and provides enough space
behind it to mount a Compaq Server Console Switch.
Figure 1-2. 1U keyboard drawer and internal keyboard with trackball
Keyboard/Video Mouse (KVM) – This abbrevition is used to refer to Keyboard/Video/Mouse cable or
switch. KVM switches also are referred to as Server Console Switches in Compaq parts lists.
Local Console – A server console system incorporates a set of KVM (keyboard, video and mouse)
devices. The word “local” in this context describes the relatively close proximity of the console from
the server, and how the console function is accomplished without the use of a network connection.
The console can be attached either directly to the server or indirectly via a KVM switch. Local-
console implementations are limited to controlling one or a few servers per console. Additionally,
KVM cables have the disadvantage of being very bulky to route especially from a rack to a number of
KVM switches located off-rack. A local-console can be in-rack or off-rack. In this paper, in-rack