HP StorageWorks XP20000 Disk Array Site Preparation Guide (AE190-96002, September 2007)

Dust and polluti
on
control
Airborne co ntaminants and particles of a certain size and hardness can damage the disk array. Some of
the most common contaminants are dust, smoke, ash, eraser debris, food crumbs, and salty air.
Mechanical filt
ers on the disk array protect it by trapping large dust par ticles. Smaller p articles can
pass through so
me
filters and can eventually cause problems in mechanical par ts. Prevent small dust
particles fro
m
entering the computer room by m aintaining its air c onditioning system at a high static
air pressure level.
Your HP representative can help you determine if you need to be concerned about airborne contaminants.
Metallic par ticulate contamination
Metallic particulates can be especially harmful around electronic equipment. This type of contamination
may enter the data center environment from a variety of sources, including but not limited to raised floor
tiles, worn air conditioning par ts, heating ducts, rotor brushes in vacuum cleaners, or printer comp onent
wear. Because metallic particulates conduct electricity, they have an increased potential for creating
shor t circuits in electronic equipment.
Over time, very fine whiskers of pure metal can form on electroplated zinc, cadmium, or tin s urfaces.
If
these whiskers a re disturbed, they may break off and become airborne, possibly causing failures or
operational interruptions. For over 50 years, the electronics industry has been aware of the relatively
rare butpossiblethreatposed by metallic particulatecontamination. Duringrecent years,agrowing
concern has developed in c omputer rooms where these c onductive contaminants are formed on the
bottom of some raised floor tiles.
Although this problem is relatively rare, it may be an issue within your computer room. Since metallic
contamination can cause permanent or intermittent failures on your electronic equipment, HP strongly
recommends that your site be evaluated for metallic particulate contamination before installation of
electronic equipment.
Data communication requirements
Route data communication cab les away from areas of high static electrical fields created by power
transformers and heavy foot traffic. Use shielded data comm cables that m eet approved industry
standar
ds to
reduce the effects of external fields.
For the HP XP disk array, you need:
Item
Descrip
tion
A dedicated analog phone line
Needed for the HP StorageWorks Continuous Track XP “phone home”
feature, if you plan to use it. An HP representative will configure Continuous
Track XP during installation. For more information on Continuous Track XP,
see the HP StorageWorks XP2 0000 Disk Array Owner’s Guide.
A twisted pair (Cat 5) cable.
An available LAN drop on
your Intranet
Needed to connect the HP XP20000 to an available Ethernet port on your
public LAN. To ensure network security, consult with an HP representative
and
your network administrator before selecting the appropriate location
of
your LAN drop .
Apublicvoice phoneline near
the
disk array
Need
ed
to allow your staff and HP representatives to communicate inside
and
o
utside your site.
Electrical requirements
Line voltage
AC line voltage at the wall power outlet is a function of the local power utility and your building power
distribution network. Voltages outside of the operating range of the disk a rray can cause intermittent
28 Site requirements