Redundant Power Supplies, a Path to Failure?


Click here to download now

Date: January 2008
Type: White Paper
Rating: (0)

Overview: A common practice in today’s mission critical data center environment is to equip servers with dual power supplies for improved reliability. However, if improperly implemented, it could increase the likelihood of power failure.

In a "perfect" scenario, such a as a Tier 4 Data Center, there are 2 completely independent power paths, each comprised of items 1-6. Each path and the items in the path must be capable of supporting 100% of the entire Data Center load by itself. This represents true 2N redundancy, which means that no single point of failure will interrupt the operation of the Data Center equipment.

Of course, not everyone is fortunate enough to operate a Tier 4 Data Center. While we would all like to have complete power system redundancy, cost usually forces some trade-offs. While we try to ensure the highest level of system fault tolerance within budget restrictions, this usually means that although servers have dual Power Supplies, there are not two completely independent paths for items 1-5.

The more common scenario is two rack level PDUs and that (hopefully) each of the server's PS cords are plugged into a different PDU. This creates a "sense" of redundancy for most administrators. In reality, this is where the hidden exposure to power problems starts.

Not what you're looking for? Search again
Go Advanced »
More From the UPS Section

View All Categories

Business Intelligence : Analytics, Business Process Management, Content management, Dashboards, Data Mining, Data Quality, Databases, Datamarts/Data Warehouses, Information Management, Knowledge Management, Performance Management

Development : Architecture & Design, C/C++, Database, Development Tools, Embedded Systems, High Performance Computing, Java, Mobility, Security, Web Development, Windows/.NET, Open Source

Government : Cloud/SaaS, Enterprise Applications, Enterprise Architecture, Federal, Information Management, Leadership, Mobile & Wireless, Policy & Regulation, Security, State & Local

Hardware : Blades, Data centers, Desktops/PCs, Grid/Cluster Computing, Handhelds/PDAs, Macintosh, Peripherals, Processors, Supercomputers, Unix/Linux servers, Utility/On-demand Computing, Virtualization Hardware, Windows Servers

Healthcare : Policy & Regulation, Leadership, Security & Privacy, Mobile & Wireless, Electronic medical records, Clinical information systems, Administration systems, Interoperability, The Patient

Infrastructure : ATM, Ethernet/Gigabit Ethernet, Frame relay, IPv6, Traffic Management, Network/Systems Management, PBXs, Printers, Remote Access, Routers, Switches, UPS, VPNs, WAN Optimization/Acceleration, Wide Area File Services

Internet : B2B, B2C, Browsers, E-Business/E-Commerce, E-retail, Google, Internet Policy, Internet Security, Search, Social Networks, Traffic Reporting/Monitoring, Web 2.0, Web Development, Social Business

Management : Career Development, Executive Insights/Interviews, H-1B, Legal, Outsourcing, Personnel Management, Recruiting, Regulation/Compliance, ROI/TCO, Salary/Compensation, Small-Medium Business, Training, Workplace Trends

Mobility : 3G Wireless/Broadband, 802.11x, Fixed Mobile Convergence, Mobile Business, Mobile Messaging, Muni Wireless, RFID, Smartphones, Wi-Fi VOIP, Wi-Fi/WiMax, Wireless Security, WLAN

Personal Tech : Blackberry, Bluetooth, Bluray, Digital Cameras, Digital Music, Digital Rights Management, Global Positioning Systems, iPhone, iPod, Peripherals, Smartphones, TVs/Home Theater, Virtual worlds

Security : Antivirus, Application Security, Attacks/Breaches, Cyberterror, Encryption, End user/Client Security, Intrusion Prevention, NAC, Perimeter Security, Privacy, Security Administration, Storage Security, Vulnerabilities and Threats

Services : Business Process Outsourcing, Business Services, Disaster Recovery, Hosted Applications, Hosted Storage, Internet/Data Services, Outsourcing, Software as a Service, Systems Integration, Telecom/Voice Services

Software : Integration, Application Optimization, Business Systems Management, CRM, Database Applications, Databases, Development Tools, ERP, Hosted Software/Applications, Linux, Open Source, Operating Systems, Productivity Applications, Server Virtualization, Service Oriented Architecture, Web Services

Storage : Data protection, Disaster Recovery, Removable/Portable Storage, Security, Storage Fabrics, Storage Systems, Virtualization

Telecom : VOIP, Unified Communications, Voice services, PBXs, Call Centers, Presence, Collaboration Systems, Business, Regulation, Internet policy

Windows/Microsoft : Applications, Internet Explorer, Microsoft Company News, Office Suite, Open Source, Operating system, Security


More Infrastructure Resources

Three Guiding Principles for Data Security and Compliance
The information explosion, the proliferation of endpoint devices, growing user volumes and new computing models like cloud, social business and big data have created new ......



More On Infrastructure