Transcript Session Number & Title

Electrical Transformation
of 1980’s Data Centers
Base on actual case studies
SESSION No. FAC 8.1
Guy Herr
ELECTRICAL ENGINEER
MICHAUD COOLEY ERICKSON
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Neutral
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Electrical Transformation of 1980’s Data Centers
Base on actual case studies
Session Description
This session will present a “sample” case study based
on multiple unnamed data centers that have gone
through the process of untangling the power cable mess
under the raised floor to align with today’s approach of
providing 2N dual distribution from the utility source
down to the rack.
It will address concerns about load management and
cascading power failures and what needs to be done to
successfully make the transformation.
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Original Conditions
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1980’s Data Center (1985 – 1990)
30-50 w/sf
“N” or “N+1” UPS “Need Plus One”
“N” PDU “Need”
Single Cord IT Equipment
Large mainframes (IBM 3090)
Disk Storage, Tape Silos
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Original Conditions 1980s
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IT Equipment Trends over 25 years
• 1980’s Data Center (1985 – 1990)
• IT equipment redundant power / supplies –
Because power supplies were not reliable
• Redundant circuits from common PDU
Circuit Redundancy / Panel Redundancy
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IT Equipment Trends over 25 years
• Redundant circuits from ‘different’ PDU’s
PDU Redundancy
• Beginning of “Load Management” issues;
Normal Mode and Failure Mode
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IT Equipment Trends over 25 years
• Replace mainframes with server cabinets
• Lots of server cabinets
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IT Equipment Trends over 25 years
• Redundant Power Support /
Diverse Distribution
• ‘2N’ Electrical Systems (Prior to Tier 4)
• Three Power Supplies WHAT?
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Result
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Data Center Evolution
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Power Redundancy; Two closest PDU’s
UPS Upgraded ‘2N’; Increase capacity (100-150 w/sf)
Electrical Floor Power Not Addressed
Difficult to manage PDU failure mode condition
Failed PDU could result in load shift to
multiple PDU’s
• Depending on UPS topology,
UPS module failure
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Multiple PDU failure
Potential to overload ‘surviving’ PDUs
Equipment failure could cascade to
complete system failure
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Present Demands
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Load could grow to 150 w/sf (or more)
5KW – 8KW Rack power is common
2N UPS Upgrade not yet able to be fully used
2N PDU zoned support desired
2N service to dual cord equipment
More Power – Larger / More PDU’s
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Approach
• Documentation of server room power
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Creation of ‘Power Zones’
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Identify “newer” PDUs
Identify “old” and inadequate PDUs
Confirm circuits to each rack
Record load of each rack circuit
Determining planned (committed) “Peak” power for each rack
Review failure mode over load condition
Paired PDUs
Zone Capacity
Replace older and smaller PDUs
Develop Plan
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Normal Operation – Before Upgrade
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Potential Failure Primary Failure
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Potential Failure Secondary Failure
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Planned Power Zones
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Existing Layout Rack Level
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Temporary Feed
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Simple Rack Cutover
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New PDU / Permanent Feeds
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Summary
• Extensive Planning &
Method of Procedures (MOP)
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Risk of single cord support – Schedule / Back up Plan
Confirm Plug Management
Identify any single cord equipment. Plan for rack outage
Communication with all stake holders
Commissioning new PDU’s in live Data Center – HEAT
New Life for Data Center
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12-15 years
Organized Zone Capacity – Paired PDU’s
Increase Floor Power to Match Upgraded Infrastructure
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3 Key Things You Have Learned During this
Session
1. It is possible to transform your aging Data
Center to meet the needs of today
2. Validate and document what you have now
and determine where you need to be going
forward
3. Extensive planning and communication is
required for the transition. Prepare detailed
MPO’s for each event
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Questions?
Thank you for your attention
Guy Herr
ELECTRICAL ENGINEER
Registered in: AL, AZ, AR, CA, CO, CT, DE, DC, GA, HI, IN, IA, KS, KY, ME,
MD, MS, NE, NV, NH, NM, NY, NC, OK, OR, RI, SD, UT, VT, VA, WA, WI, WY
612-673-6832
[email protected]
www.michaudcooley.com
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