Cisco MDS 9148S AC Power Supply, Spare

The Cisco MDS 9148S AC Power Supply, Spare is a critical component designed to keep your data center fabric fabricating at peak reliability. Specifically engineered for the Cisco MDS 9148S Multiservice Fabric Switch, this spare power supply ensures uninterrupted power delivery to sustain high‑availability operations, optimize uptime, and protect mission‑critical applications. In modern data centers where every millisecond of downtime matters, this spare power supply delivers the stability and resilience needed to support demanding workloads, rapid growth, and evolving network demands. Built with Cisco’s quality standards, it integrates seamlessly into your rack and works alongside your primary power supplies to provide dependable redundancy and consistent performance across your fabric network.

• Reliability for mission‑critical fabrics: The MDS 9148S AC Power Supply, Spare is engineered to deliver steady, clean power to the switch and its fabric connections. By joining with the primary unit in a redundant configuration, it helps maintain uninterrupted fabric operations even during maintenance or unexpected faults, reducing the risk of service disruption in Fibre Channel, IP storage, and data center interconnects.
• Hot‑swap readiness for zero‑downtime maintenance: Designed for easy removal and replacement without interrupting essential services, this spare supports hot‑swapping in compatible chassis configurations. The ability to swap power modules while the system remains online translates into lower maintenance windows, improved availability, and simpler capacity management for busy data centers.
• Energy‑efficient design to lower operating costs: The spare power supply emphasizes energy efficiency and optimized power delivery, helping data centers manage total cost of ownership (TCO) while meeting demanding performance and reliability standards. Its optimized power conversion reduces heat output, contributing to cooler rack environments and potentially lower cooling expenses.
• Compact, standards‑based form factor with reliable connectors: Built to Cisco specifications, this power supply fits cleanly into the MDS 9148S chassis, featuring robust connectors and shielding that support durable operation in dense rack environments. Its modular design aligns with best practices for scalable, extensible fabric networks and simplifies inventory management for IT and data center teams.
• Certified spare part with trusted Cisco support: As a genuine Cisco spare, it carries the confidence of Cisco’s engineering validation and access to official support channels. This helps ensure compatibility, firmware alignment, and serviceability within your existing Cisco ecosystem, reinforcing network resilience and consistent performance across your MDS fabric.

Technical Details of Cisco MDS 9148S AC Power Supply, Spare

• Product type: AC power supply unit (Spare) designed for the Cisco MDS 9148S Multiservice Fabric Switch.
• Compatibility: Specifically qualified for use with the Cisco MDS 9148S switch family to support redundant power configurations.
• Performance focus: High‑efficiency power delivery and stable voltage regulation to support consistent fabric performance and data path reliability.
• Physical characteristics: Modular, hot‑swappable design with secure connections suitable for dense data center racks.
• Certifications and support: Cisco‑standard compliance and access to official warranty, support, and service programs for spare parts.

How to install Cisco MDS 9148S AC Power Supply

Installing the Cisco MDS 9148S AC Power Supply, Spare is straightforward when following standard data center safety practices and Cisco guidelines for redundant power configurations. The hot‑swap design enables replacement with minimal disruption, though it is important to confirm that the system and rack meet the recommended environment and power requirements before starting. Below are generalized steps to guide the installation process. Always refer to your specific Cisco installation and maintenance documentation for exact procedures tailored to your hardware revision and data center policy.

• Prepare the environment: Verify that you have the correct spare part model for the MDS 9148S, and confirm that your rack environment meets operating temperature, humidity, and electrical standards. If possible, coordinate with your data center team to plan a maintenance window, even though hot‑swap operation is supported in many configurations.
• Power down considerations: In a typical hot‑swap scenario, you may replace the spare without powering down the entire switch. If your environment requires a partial shutdown for safety or policy reasons, follow your standard safety procedures and ensure all personnel are prepared to handle live components.
• Access the power supply bay: Locate the corresponding power supply bay on the MDS 9148S chassis. If replacing a failed or degraded unit, identify the failed module using the chassis LED indicators or management software. Use appropriate electrostatic discharge (ESD) protection and handle the module with care to avoid damage to connectors and the chassis.
• Remove the failed spare (if applicable): If you are replacing an existing module, gently disengage any securing mechanisms, then slide the old unit out of the bay. Take caution not to disturb adjacent components or cables. Set the old module aside in an anti‑static bag if it will be returned or recycled according to your asset management policy.
• Install the new spare module: Align the MDS 9148S AC Power Supply, Spare with the bay guides and slide it into place until it seats firmly. Ensure all connectors are fully engaged and the module is locked into the bay. If your chassis requires power cord connections, attach the appropriate IEC power cable(s) and tighten any strain reliefs to reduce movement and wear.
• Power and verify: Reconnect the power source, or power on the subsystem if you performed a partial shutdown. Check chassis LED indicators and management software to confirm healthy operation. Verify that the spare is recognized by the Cisco Fabric Manager or equivalent network management tool and that the system reports a healthy redundant path.
• Post‑installation checks: Monitor for normal operating temperatures, verify that both primary and spare power supplies are delivering stable voltages, and confirm that there are no fault logs related to power delivery. Maintain documentation of the replacement for future troubleshooting and inventory control.

Frequently asked questions

• Q: Is the Cisco MDS 9148S AC Power Supply, Spare hot‑swappable?
  A: Yes. The spare is designed for hot‑swap operation in compatible configurations, enabling maintenance without a full system shutdown in many deployments.
• Q: What is the purpose of having a spare power supply for the MDS 9148S?
  A: A spare power supply provides redundancy, helping to protect against single‑point failures in the data path and maintaining uninterrupted fabric services during maintenance or an outage of the primary PSU.
• Q: Does this spare come with a warranty?
  A: As a genuine Cisco spare part, it is typically covered under Cisco’s spare parts warranty terms and service offerings. Check your regional Cisco service agreement for exact coverage details.
• Q: Will the spare power supply affect performance when both units are active?
  A: In a properly configured redundant setup, both the primary and spare power supplies work together to support power delivery. The spare should not impede performance and is intended to enhance reliability and uptime.
• Q: How do I know if I need a spare power supply?
  A: If you operate a Cisco MDS 9148S in an environment where high availability is required, maintaining a stocked spare is a prudent practice. It reduces downtime risk during maintenance or component failure and supports rapid service restoration.
• Q: Are there compatibility considerations I should be aware of?
  A: Always verify that the spare part is the exact model intended for your MDS 9148S revision and that firmware and management software are aligned. Refer to Cisco’s compatibility matrices and your network design documentation for precise guidance.