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10842 G2
Best Practices Manual
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HP 10622 G2, 10636 G2, 10642 G2, 10647 G2, 10842 G2 Best Practices Manual

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Best practices for HP 10000 Series and HP 10000 G2 Series Racks
best practice
Abstract.............................................................................................................................................. 1
10000 G2 Series overview .................................................................................................................. 1
Product availability .............................................................................................................................. 3
Specifications...................................................................................................................................... 3
Dimensions...................................................................................................................................... 4
Additional Resources ........................................................................................................................ 6
Certification and regulatory compliance ................................................................................................. 6
Product certification.......................................................................................................................... 6
HP General Specification for Environment compliance.......................................................................... 6
Information Technology Equipment..................................................................................................... 6
Integration services and software........................................................................................................... 7
HP Factory Express........................................................................................................................... 7
HP eCo-Enterprise Configurator ......................................................................................................... 7
HP UPS Sizing Tool .......................................................................................................................... 7
Rack documentation CD.................................................................................................................... 8
Rack deployment considerations............................................................................................................ 8
Levels of rack security ....................................................................................................................... 8
Stabilization requirements ................................................................................................................. 8
Stabilization for seismic activity ....................................................................................................... 10
Space and cable management requirements ..................................................................................... 11
Thermal requirements ..................................................................................................................... 12
Additional resources....................................................................................................................... 13
Rack assembly guidelines ................................................................................................................... 13
Additional resources....................................................................................................................... 13
Installation and maintenance precautions ............................................................................................. 14
Data Center planning and considerations ............................................................................................. 16
Environmental considerations .......................................................................................................... 16
Third-party thermal considerations.................................................................................................... 18
Power considerations...................................................................................................................... 19
Equipment clearance and floor loading ................................................................................................ 20
Rack and accessory footprints.......................................................................................................... 21
Qualified shipping............................................................................................................................. 23
Qualification of rack components for shipping...................................................................................24
Rack shipping enclosures ................................................................................................................ 24
10000 and 10000 G2 Series Rack packing materials ....................................................................... 27
Preparation for shipment................................................................................................................. 27
Site preparation for receiving Integrated Racks.................................................................................. 28
General considerations (all shipments).............................................................................................. 28
Special shipping considerations....................................................................................................... 29
Door Height Clearances ................................................................................................................. 30
Modes of shipment......................................................................................................................... 30
Airfreight ...................................................................................................................................... 31
Mode of receiving and delivery ....................................................................................................... 33
10000 and 10000 G2 Series Rack packing and shock pallet assembly............................................... 34
Dismounting a 10000 G2 Series Rack from a shock pallet.................................................................. 42
Installation service.............................................................................................................................. 43
Spares kits .................................................................................................................................... 43
Additional tools and equipment ....................................................................................................... 43
Battery decals and boxes ................................................................................................................ 43
Appendix a: glossary......................................................................................................................... 44
Appendix b: torque values.................................................................................................................. 45
Abstract
This document outlines recommended practices for configuring, installing, transporting, and establishing a work environment for the HP 10000 and HP 10000 Generation 2 (G2) Series Racks, which includes the following models:
• 10000 Series rack models – S10614
• 10000 G2 Series rack models – 10622 G2
– 10636 G2 – 10642 G2 – 10647 G2 – 10842 G2
10000 G2 Series overview
10000 G2 Series racks (see Figure 1) provide an integrated platform for mounting computing solutions and are designed for strength and durability.
Figure 1. 10000 G2 Series rack
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HP racks and rack accessories ease the centralization, protection, organization, and access to hardware for servicing and upgrading. HP racks are flexible, secure, and designed to industry standards. HP racks are designed be populated with the following HP products:
• HP ProLiant servers
• HP BladeSystem servers
• HP 9000 servers
• HP Integrity servers
• HP StorageWorks products
• HP rack mount power protection products
• HP rack mount switches
• HP rack mount monitors
The 10000 G2 Series racks are designed for greater ease-of-use. The 10000 G2 Series rack design is based on the original 10000 Series racks.
Table 1 lists the key features of the 10000 G2 Series racks.
Table 1. 10000 G2 Series rack key features
Component Features
Front door
Rear doors
Side panels
Vertical ElA mounting rails
Rear extension kit
Standard and heavy-duty stabilizers
The front door is designed to allow for air flow of 65 percent. The major change in the front door is the look; the front door design has been updated to reflect the evolving Industrial Design tastes of high value and high volume customers. Based on the 10000 Series rack door, it maintains the airflow capabilities of its predecessors, while the handle and closing mechanisms have been improved and a new, modernized visual effect has been implemented.
The rear doors have been modified to maximize the perforations supporting airflow requirements. The rear door handle is designed to provide a more ergonomically pleasing design.
The side panel design has been updated in favor of a lighter, easier to install three-part solution.
These e-coated black rails with white U-markings provide greater contrast to aid in the installation of product to the rails. The ESD grounding location provides a more readily available solution.
An optional rear extension is available for Models 36U and 42U for improved cable management,
New, improved standard and heavy duty stabilizers which also address ease of installation.
Grounding kit
Rack tie-down kit
New universal grounding kit supports the 9000, 10000, and 10000 G2 Series racks.
For stability needs, the rack tie-down kit is available for the 10000 G2 Series racks.
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Product availability
The 10000 Series rack Model S10614 is available.
NOTE
The following 10000 Series rack models are discontinued:
• 10622
• 10636
• 10642
• 10647
•
10842
Specifications
The 10000 and 10000 G2 Series racks are graphite-metallic in color and are available in the rack heights listed in Table 2. The racks are one-meter deep allowing more room for cable management and for accommodating deeper server and storage equipment.
Additional cable management features are as follows:
• Wide (or 800-mm) rack models can accommodate network cabling on the sides of the rack.
• A cable egress in the top of the rack allows for overhead data center cabling.
• Split rear doors provide greater efficiency with respect to service access.
• A removable access panel on the rear door provides added flexibility for cable routing out the rear
and bottom of the rack.
• Velcro straps for bundling cables within the rack are included in the hardware kit and also available as an option.
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Dimensions
Table 2 lists the dimensions of the 10000 and 10000 G2 Series rack models.
Table 2. 10000 and 10000 G2 Series rack dimensions
Rack model U height Width Depth
10000 Series rack models:
S10614 14U 600 mm /
10000 G2 Series rack models:
10622 G2 22U 600 mm /
10636 G2 36U 600 mm /
10636 G2
with rear extension
10642 G2 42U 600 mm /
10642 G2
with rear extension
10647 G2 47U 600 mm /
10842 G2 42U 800 mm /
23.62 in.
23.62 in.
23.62 in.
36U 600 mm /
23.62 in.
23.62 in.
42U 600 mm /
23.62 in.
23.62 in.
31.49 in.
1,000 mm /
39.37 in.
1,000 mm /
39.37 in.
1,000 mm /
39.37 in.
1184.9 mm /
46.65 in.
1,000 mm /
39.37 in.
1184.9 mm /
46.65 in.
1,000 mm /
39.37 in.
1,000 mm /
39.37 in.
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Table 3 lists the 10000 G2 Series rack specification details.
Table 3. 10000 G2 Series rack specification details
Rack Details HP 10000 G2 Series racks
Rack Model 10622 G2 10636 G2 10642 G2 10647 G2 10842 G2
EIA-310 type Type D Type D Type D Type D Type D
1113.48 mm
Rack height max.
Rack U height 22U 36U 42U 47U 42U
D=1045# Max. weight capacity D=Dynamic/S=Static
Rack width: no side panels
Rack width: with side panels
Rack depth: front to rear door
Front door percentage open space
Nominal distance from front mtg flange to inside of rear door
Min. front equipment opening width
Nominal Front Equipment opening width
S=1045#
597.3 mm
612.77 mm
1015 mm
63%
915.36 mm
451.3 mm
(per EIA)
452 mm
(per EIA)
1735.78 mm 2003.5 mm 2285 mm
D=1520# S=2000#
597.3mm 597.3mm 597.3mm
604.3 mm 604.3 mm 604.3 mm
1015 mm 1015 mm 1015 mm
65% 65% 65%
915.36 mm 915.36 mm 915.36 mm
451.3 mm (per EIA)
452 mm (per EIA)
D=2000# S=2000#
451.3 mm (per EIA)
452 mm (per EIA)
D=Not applicable S=2000#
451.3 mm (per EIA)
452 mm (per EIA)
2000 mm (+/- 3 mm)
D=1000# S=2000#
800mm
815.47mm
1015 mm
63%
915.36 mm
451.33 mm (per EIA)
452mm (per EIA)
Nom Ctr-to-ctr distance for equipment
Std equipment mounting hardware for rack (example, clip nuts)
Mounting hardware size (example, M5)
Nominal front/back mounting distance
Overall rack/extension depth
Nominal distance from front mtg flange to inside of rear door with extension
465 mm
(per EIA)
Cage nuts
M6 supplied;
M5&10-32
supported
742 mm
Not
applicable
Not
applicable
465 mm (per EIA)
Cage nuts Cage nuts Cage nuts
M6 supplied;
M5&10-32 supported
742 mm 742 mm 742 mm
1184.9 mm/
46.65 in.
1060.87 mm 1060.87 mm
465 mm (per EIA)
M6 supplied;
M5&10-32 supported
1184.9 mm/
46.65 in.
465 mm (per EIA)
M6 supplied;
M5&10-32 supported
Not applicable
Not applicable
465mm (per EIA)
Cage nuts
M6 supplied; M5&10-32 supported
742 mm
Not applicable
Not applicable
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Additional Resources
Additional resources are available as follows:
• For a complete list of HP rack options and accessories, go to the main rack page at
www.hp.com/products/racks or to the main rack options page at www.hp.com/products/rackoptions.
• For a list of ProLiant servers and options, go to
• For a list of HP power products such as UPS and PDU, go to
• For a complete list of HP server storage equipment, go to
www.hp.com/products/proliant.
www.hp.com/products/ups.
www.hp.com/products/serverstorage.
Certification and regulatory compliance
Product certification
The10000 and 10000 G2 Series racks are defined as non-functional mechanical storage bays and therefore, are not certified individually as a stand-alone product. The rack does not serve as an overall safety or EMI rated enclosure nor does it carry any other Agency compliant rating. However, any product intended for use in an HP rack should be individually certified as a stand-alone product. For example, HP Power Distribution products, such as uninterruptible power supplies (UPSs) and power distribution units (PDUs) are fully certified as stand-alone products.
Certain third-party products may not be fully certified as stand-alone products. Any product that does not meet stand-alone certification is not included in any HP-specified rack configuration and should not be installed in an HP rack.
HP General Specification for Environment compliance
HP General Specification for Environment (GSE) specifications prohibit or restrict the use of certain chemical compounds in products or in the manufacture of products. HP complies with the GSE specifications and restricts the use of these compounds in the development or manufacture of any HP product (including third-party supplier product).
Information Technology Equipment
The 10000 and 10000 G2 Series racks are designed to comply with the applicable safety requirements for Information Technology Equipment (ITE) when the rack is configured with properly certified equipment. The 10000 and 10000 G2 Series racks are considered ITE compliant when the following conditions are met:
• The rack is populated with individually certified products
• All installation guidelines and instructions are followed
Waste Electrical and Electronic Equipment directive
The directive on Waste Electrical and Electronic Equipment (WEEE) requires manufacturers to finance the take back and recovery of waste from electrical and electronic equipment at the end of its useful life.
Any product or product packaging marked with the symbol in Figure 2 must not be disposed of with other household waste. The customer must dispose of the product by delivering the product to a designated collection point for the recycling of waste electrical and electronic equipment. For more information about locations to drop off equipment for recycling, please contact a local city office, the
Figure 2. WEEE disposal symbol
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household waste disposal service, or the business where the product was purchased.
Integration services and software
Several resources are available for planning rack configurations.
HP Factory Express
Factory Express is a robust portfolio of flexible, pre-priced, configured, customized and integrated factory solutions and deployment services – supporting HP products from the desktop to the data center with Windows®, Linux, and HP-UX 11i.
Additional resources
For specific information, please see the HP Factory Express link:
In addition to this available integration option, HP also provides information links and contacts for problem solving of rack and product compatibility in support of Build to Order on site locations through several venues. Please refer to the following resources:
• Frequently Asked Questions about Rack and Power products and interoperability
http://iss.tsgonline.hp.com/iss/workgroup/rackandpower/download/Rack 20System 20faqs.doc
• Contact your sales representative for the Interoperability guide to fit and HP ProLiant servers into HP Rack System/E and 9000/10000 racks:
http://iss.tsgonline.hp.com/iss/workgroup/rackandpower/interoperability.asp
• To specifically request help on rack and power solutions:
http://iss.tsgonline.hp.com/iss/workgroup/rackandpower/requestform.asp
www.hp.com/go/factory-express.
HP eCo-Enterprise Configurator
If you require factory default racking for our HP hardware portfolio, you may still use the HP eCo­Enterprise Configurator. If you require "custom" rack configuration capabilities, please contact the HP Customer Business Center or an HP Authorized Partner for assistance.
Additional resources
For more information on the eCO Custom Builder tool, refer to the following HP websites:
• eCO-Enterprise Configurator:
• eCO-Enterprise Configurator features:
• Frequently asked questions
• What's new:
• Technical support:
http://h30099.www3.hp.com/configurator/about.asp
http://h30099.www3.hp.com/configurator/support.asp
http://h30099.www3.hp.com/configurator/
http://h30099.www3.hp.com/configurator/features.asp
: http://h30099.www3.hp.com/configurator/docs/eCo_FAQ.doc
HP UPS Sizing Tool
The UPS Sizing tool is an online tool that collects information on power consumption requirements and then provides the correct UPS product for those requirements.
Additional resources
For additional information on the UPS Sizing tool, refer to
http://www.upssizer.com/selector.asp.
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Rack documentation CD
The Documentation CD shipped with the rack provides documentation for installing and optimizing the rack.
Rack deployment considerations
The following sections describe the components and HP options available for the 10000 and 10000 G2 Series racks that may be necessary to achieve safety, regulatory compliance, or functionality requirements.
Levels of rack security
Either of the following conditions may be necessary for compliance with certain safety certifications:
• Racks must be located in a restricted access area that is only accessible to trained personnel.
-Or-
• Racks must be configured with lockable hardware.
HP rack front doors, rear doors, and side panels support this locking requirement. Rear split doors are standard on 10000 and 10000 G2 Series racks. (The 10000 Series rack Model S10614 is not configured with split rear doors).
HP 10000 G2 Series rack front doors
All 10000 and 10000 G2 Series rack Models ship with front doors. The 42U and 36U front doors (and necessary hardware) are available as option kits are backwards compatible with the 10000 Series racks of the same heights; this enables customers to have all racks standardized with the same updated look, if desired.
NOTE
The front door option kit is not compatible with the 9000 Series racks.
HP 10000 G2 Series rack rear doors
All 10000 and 10000 G2 Series rack models ship with rear doors as part of the standard configuration. The 10000 G2 rear door has been upgraded to provide a more ergonomically and cosmetically pleasing handle.
HP Side Panel Option Kit
Side panels aid in providing proper front to rear airflow and a first level of security. 10000 Series rack Models S10614 and 10622 ship with side panels installed. Side Panel Option kits are available for all other rack models.
Stabilization requirements
Rack stability is of special concern when equipment is routinely installed, removed, or accessed within the rack. Stability is addressed through the use of leveling feet, baying kits, fixed stabilizers, and/or ballast.
Leveling feet
Leveling feet are adjustable stabilizers that provide leveling of the rack at the installation site and ship installed to the racks. HP 10000 and 10000 G2 Series racks ship with leveling pads for stabilization; these parts are found in the hardware kit – also shipped with each rack.
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HP 10000 Baying Kit
Baying kits are used to physically connect adjacent racks to create a row of two or more units. Racks that are bayed together with a baying kit are more stable and reduce the potential tipping of the rack. The same baying kit supports the 10000 and 10000 G2 Series Racks.
HP 10000 Stabilizer Kit
Fixed stabilizers are anti-tip feet (front and side) that provide stability and support when equipment is installed, removed or accessed within the rack.
The following stabilizers are available:
• HP 10000 G2 600 mm Stabilizers
• HP 10000 G2 Heavy Duty 600-mm Stabilizer
• HP 10000 G2 800-mm Stabilizer
NOTE
The 600-mm and 800-mm stabilizer designs are different between the 10000 and 10000 G2 Series racks and have different part numbers.
If racks are secured together with baying kits, the side feet installed on each end of the row of racks are considered optional.
Rack rows with four or more bayed racks do not need a stabilizer kit installed. Single racks or bays of three racks, with no component exceeding 100 kg (220 lbs.), a standard 600-mm stabilizer is required.
HP recommends that stabilizer option kits be used when one or more of the following situations occur:
• If a standard 600-mm (23.62-in.) or 800-mm (31.50-in.) front stabilizing foot is installed on a stand- alone rack, the side feet, provided with the fixed stabilizer kit, should also be installed to stabilize stand-alone racks from the side.
• A heavy duty 600-mm (23.62-in.) front stabilizer foot is required in either of the following situations:
– A single rack-mountable component weighing 100 kg (220 lbs.) (or greater) is installed in a
stand-alone rack. – A rack row of three or fewer racks are bayed together – Side feet, which are included in the stabilizer kits, should also be installed to stabilize the rack
WARNING
To reduce the risk of personal injury or damage to the equipment, be sure that:
• The leveling feet are extended to the floor.
• The full weight of the rack rests on the leveling feet.
• The stabilizing feet are attached to the rack if it is a single-rack
installation.
• The racks are coupled together in multiple-rack installations.
• Only one component is extended at a time or the rack may become
unstable.
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HP 10000 Ballast Option Kit
Ballast plates add weight to a rack and therefore improve side-to-side and front-to-back mechanical stability for stand-alone racks or a row of three or fewer racks bayed together. Ballast plates fit in the zero-U space at the interior sides of the rack and should be installed into the rack prior to installation of any other equipment.
NOTE
The 10000 Ballast option kit is compatible with all 10000 and 10000 G2 Series racks.
Increasing rack weight
A rack with a light static load (less than 95 kg / 210 lbs.) should have ballast plates installed to provide extra weight, thus reducing the possibility of the rack tipping over if a significant force where to be applied to the rear or side of the rack. Racks with a heavier static load (greater than 95 kg / 210 lbs.), depending on the particular configuration involved, may not require ballasts.
Multiple Ballast kits may be necessary to provide sufficient weight. Each kit contains two 40-lb. (18­kg) ballast plates. Ballast plates should be added to the rack until the total weight of components installed into the rack is 210 lbs. (95 kg) (minimum).
For example, a lightly loaded rack configured with 50 lbs. (23 kg) of equipment requires two ballast kits (four ballast plates). The total weight of four ballast plates is 160 lbs. (72 kg). Therefore, the total installed weight of the rack components would be 210 lbs. (the minimum recommended rack installed component weight):
Should any rack component weigh more than 100 lbs. (46 kg), there must be and additional 210 lbs. (91 kg) of equipment weight in the rack (excluding the weight of the component) to provide balance and maintain rack stability when the component is extended on its rails. In this instance, ballast plates should be added until the total rack component weight is 300 lbs. (or greater).
Total weight of installed equipment + total weight of ballast plates = total rack component weight
WARNING
To reduce the risk of personal injury or damage to equipment, extend only one component at a time. The rack may become unstable if more than one component is extended.
Stabilization for seismic activity
Rack installations in geographical areas where there is a risk of seismic activity require special considerations for stabilization of the rack.
IMPORTANT
The 10000 and 10000 G2 Series racks are not qualified as a Zone 4 or OSHPOD solution.
An equipment integrator will need to determine the requirements for which, if any, ballast and stabilizer kits are required. If the rack is bolted to the floor or to adjacent racks that have sufficient combined weight, additional stabilization products may not be required.
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HP 10000 Series Plinth Option Kit
The Plinth Option kit provides a means for meeting building code guidelines to anchor a 10000 Series rack to the floor in geographical areas prone to seismic activity. This product provides a solution to aid in avoiding damage or serious injury in the event of building or floor movement.
IMPORTANT
The Plinth option does not qualify the 10000 Series rack as a Zone 4 solution.
NOTE
The 10000 G2 Series racks do not support the Plinth option.
A technology brief entitled “Seismic anchoring of computing equipment using the HP Plinth kit” is available at:
http://h20000.www2.hp.com/bc/docs/support/SupportManual/c00251418/c00251418.pdf.
HP 10000 G2 Series Tie Down Option Kit
The Rack Tie Down kit for 10000 G2 Series racks can be used to secure a rack to a data center concrete floor to prevent racks from tipping in the event of building or floor movement.
IMPORTANT
The Rack Tie Down option does not qualify the 10000 G2 Series rack as a Zone 4 solution.
NOTE
The Rack Tie Down kit supports the 10000 G2 Series racks only.
Space and cable management requirements
Extension kits
Cables and equipment can be damaged in use or in shipping if there is insufficient room in the rack. Extensions can be used when additional room is required at the rear of the rack to provide adequate room for equipment and associated cables. The extension kit provides approximately 6.0 inches (155 mm) of additional space at the rear of the rack.
NOTE
Extension kits are available as options. Due to pallet size, an Extension kit cannot be installed at the factory and is not available for Configure to Order racks. Use extended depth SKU for CTO orders.
Extension kits are compatible with the following 600-mm rack models:
• 36U Extension kit: – HP 10000 Series Rack Model 10636
– HP 10000 G2 Series Rack Model 10636 G2
• 42U Extension kit: – HP 10000 Series Rack Model 10642
– HP 10000 G2 Series Rack Model 10642 G2
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Cable management kits
Due to the dynamic nature of the rack environment, the cabling of systems has very few hard rules. Cable management kits provide an easy way to organize and route cables within racks. Several kits are available as options to assist with cabling requirements.
Additional information on cable management kits is available at
www.hp.com/products/rackoptions.
HP general guidelines for cable management are as follows:
• Use eCo-Enterprise Configurator to fully plan the rack and server setup prior to installation.
• For good visual reference, do not install cabling until all equipment has been installed in the rack.
• Avoid dressing cabling tightly over sharp edges of railing or panels.
• Avoid pinching of cables between components.
• Avoid tight bend radii. Cables should never be bent tight enough to cause a crease in the
sheathing. Fiber cables must not violate their minimum bend radius – no exceptions.
• When securing cables inside the rack, the bundle should be dressed in such a way as to avoid interference with installed components or rack side panels or rails.
• When possible, use all cable management arms included in component kits.
• For components that must be movable while Powered On, ensure a full range of motion is possible
without cable interference or disconnect. Cables dressed on management arms must be secured enough to prevent movement into interference or pinch areas, yet not so tight as to cause binding to the arm.
• Separate power and signal cables as much as possible. For example, dress all signal cables on the Left side of the rack and all power cables on the Right side of the rack.
• Ensure that cabling does not impede the airflow to the rack-mountable servers or increase the internal rack temperature beyond the specified maximum rating.
A list of available extension kits can be found at the main rack options product page at
www.hp.com/products/rackoptions.
Thermal requirements
Equipment that is exposed to excessive heat may not operate correctly and may experience abnormally high failure rates. The 10000 and 10000 G2 Series rack air flows from the front to the rear of the rack. HP recommends that rack components only be installed on the front rails for many reasons including proper airflow. Roof-mounted Fan kits (available for 10000 and 10000 G2 Series racks) may help meet additional thermal requirements of rack-mounted equipment and are used to keep the ambient temperature inside the rack within the specified operational limits of the equipment.
NOTE
800-mm racks include vertical filler panels for thermal management.
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Additional resources
For information on options available for the 10000 Series Rack, refer to the Rack Options Catalogue at
http://h18004.www1.hp.com/products/servers/proliantstorage/racks/10000series/documentation.html.
For information on deployment and configuration of multiple servers in a single rack, refer to the white paper on high-density deployment on the HP 10000 Series Rack support and documentation section at
http://h18004.www1.hp.com/products/servers/proliantstorage/racks/10000series/documentation.html.
For information on the HP Modular Cooling System refer to the HP Modular Cooling System Site Preparation Guide and white papers available at
http://h20000.www2.hp.com/bizsupport/TechSupport/Home.jsp?lang=en&cc=us&prodTypeId=329290&prod SeriesId=1155256.
Rack assembly guidelines
Table 4 lists guidelines to follow when physically placing components in a 10000 or 10000 G2 Series Rack.
Table 4. Rack assembly guidelines
Component Guideline
Weight Sort all components by weight, placing the heaviest components at the bottom of
the rack.
Keyboard/video/mouse (KVM) switch box
Keyboard/integrated keyboard monitor
Monitor Ergonomic considerations should drive the placement of a monitor in the rack,
Balance When baying racks to create a row, be sure to distribute the weight load among
Mount the switchbox either behind the keyboard or within a sidewall cavity to provide a zero-U space solution.
When using any size rack, install the keyboard/integrated keyboard monitor at a level that is in the correct ergonomic position where your shoulders and neck are relaxed.
whether it is a CRT or Flat-panel design. It is recommended to arrange the screen or rack-mountable flat panel monitor, a minimum of 4U’s above the keyboard tray. Most customers prefer placement of the video system high in the rack, especially in a full rack, to allow easier access to serviceability of other system components below it. If you are using a 22U rack, place the monitor on top of the rack frame.
the racks and place the heaviest components at the bottom of each rack. For example, if you have several UPS units and several servers, do not put all of the UPS units into one rack—distribute the weight evenly in the bottom positions of each rack.
Additional resources
For further information regarding component placement, refer to the Important Safety Instructions that are shipped with the rack and the Safety and Comfort Guide - Precautions for Server and Network Products located at
www.hp.com (search for the safety and comfort guide).
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