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

WARNING!
If metal is used in the construction of the raised floor, ensure that there is a common ground
connection between the raised floor and main floor to avoid possible build up of different voltage
potentials. Failure to comply can result in serious injury to personnel and damage to equipment.
Requirements for raised floors:
• Raised floor access ramps must not exceed a 10 degree slope.
• Use a raised floor system (254 to 305 mm, 10 to 12 in) for the most favorable room air
distribution system.
• Grid panelsmust beat least 450x450mm(17.72 x 17.72in).
• The floor must have a load rating between 300 and 500 kg per square meter (553 to 921.7
lb per square yard, or 61.4 to 102.4 lb per square foot) . The maximum floor loading at any
point is 500 kg (1 102.3 lb) .
Estimating required floor load rating
To estimate the load rating you need for your floor, consider the total weight of all of these items:
• The disk array; see the preceding Component weights
• Other equipment
• Furniture such as desks, chairs, and storage cabinets
• Computer room personnel
• Moving equipment such as forklifts, dollies, and similar items
The lower the floor load rating, the more clearance is required around the array to distribute the
equipment weight correctly. If your computer room is too small to allow for minimum required clearance
around the array, you may need to increase the floorloadrating. Formoreonrequired clearance, see
Floor clearance and cutout dimensions later in this chapter.
Floor covering
HP recommends the use of a tiled raised floor.
CAUTION:
HP strongly discourages the use of carpeting, including antistatic varieties, within 6.0 m (20 ft) of the disk
array. Over time, carpeting may shed d ust that can cause problems with the disk array.
CAUTION
:
If your c
omputer room has carpeting, place static discharge mats so that personnel must walk across
them bef
ore touching any part of the array. F ailure to comply with this precaution can result in equipment
damage through static discharge.
Floor clearance
NOTE:
The H P StorageWorks XP20000 Disk Array includes a cabling access hole with sliding c over in the top
of each rack for cable drops from overhead. The hole is located in the rear of the rack. This gives
you the option of feeding c ables to the rack from overhead or from the floor through a floor cutout
(described below).
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