General Computer Room Requirements; Preventing Electrostatic Discharge - HP StorageWorks XP12000 - Disk Array Site Preparation Manual

Part Number
AE051AS

General computer room requirements

The goal of a computer room is to maintain an ideal environment for computer equipment, including
this system.
Make sure your computer room adheres to all national and local building codes for a data
center/computer room environment.
HP recommends that you follow these general guidelines:
• Locate the computer room away from exterior walls of the building to avoid the heat gain from
windows and exterior wall surfaces.
• When exterior windows are unavoidable, use windows that are double or tripled glazed and
shaded to prevent direct sunlight from entering the computer room.
• Maintain the computer room at a positive pressure relative to the surrounding spaces to reduce
introduction of contaminants.
• Install a vapor barrier around the entire computer room envelope (floors/walls/ceiling) to help
keep moisture out of the room. This is especially important if your computer room is located
underground.
• Caulk and vapor-seal all pipes and cables that penetrate the computer room envelope.

Preventing electrostatic discharge

Electrostatic discharge (ESD) can cause component damage, especially during servicing operations.
Static charges occur when objects are separated or rubbed together. The voltage level of a static
charge is determined by the following factors:
• Types of materials
• Relative humidity — low humidity increases ESD voltage.
• Rate of change — a standard air conditioner cools the air and lowers humidity. The faster the air
is cooled and dried, the greater the likelihood of ESD.
• Separation — refers to the static discharge that can be generated when two objects are separated.
For example, printer paper is often stored in cool dry conditions. If opened and used immediately,
the act of removing the paper from its box generates static. To allow the static to discharge
gradually over time, leave the box open in the computer room for several hours before use.
Follow these precautions to minimize possible ESD-induced failures in your computer room:
• Install conductive flooring (conductive adhesive must be used when laying tiles).
• Use conductive wax if waxed floors are installed.
• Ensure that all equipment and flooring are properly grounded and are at the same ground potential.
• Use conductive tables and chairs.
• Store spare electric parts in antistatic containers.
• Maintain recommended humidity level and airflow rates.
Description
HP XP12000 146-GB 10k-rpm Spare Disk
Weight
Total unpackaged weight of your configuration
XP12000 Disk Array Site Preparation Guide
Unit Total
Qty weight
(lbs) (lbs)
2 x 4 =
3258.3
8
25