Supermicro Supermicro Direct Liquid Cooling Service Associate (SDLCSA) Exam SDLCSA Exam Dumps: Updated Questions & Answers (October 2025)

Replacing an NVMe SSD in a Supermicro system like the SYS-421GE-TNHR2-LCC, which supports Direct Liquid Cooling, follows a standard procedure for hot-swappable drives in high-performance servers. The correct sequence, as outlined in Supermicro’s general server maintenance guides (e.g., for SYS-420 series or similar DLC-enabled systems), is:

Remove failed drive/drive carrier from chassis carriage: NVMe drives are housed in carriers for easy access and hot-swap capability, a feature emphasized in Supermicro’s DLC rack-scale solutions for minimizing downtime in AI/HPC workloads.

Remove failed drive from drive carrier: The carrier is opened to extract the faulty NVMe SSD.

Insert new drive into drive carrier: The replacement NVMe SSD is secured into the carrier.

Insert new drive/drive carrier into chassis carriage: The carrier is reinserted into the chassis, ensuring proper connection.Option D accurately reflects this logical order. Option A incorrectly involves DIMMs (memory modules), B mentions a fan (unrelated to NVMe replacement), and C involves a CPU (not part of the process). Supermicro’s DLC systems prioritize modularity and serviceability, making D the verified procedure.References:Supermicro NVMe SSD replacement guides (e.g., SYS-420GP-TNAR Manual), DLC solution serviceability features.

In Supermicro’s high-end servers like the SYS-421GE-TNHR2-LCC, PSUs are typically located at the back of the chassis for accessibility and cooling efficiency, a design consistent with DLC rack-scale solutions (e.g., SYS-420GP-TNAR). The mention of a “dummy PSU tray” suggests a placeholder or empty slot, common in modular designs to maintain airflow or allow future expansion. This layout is standard in Supermicro’s DLC systems, where PSUs power both compute and cooling components (e.g., pumps, CDUs). No contradicting evidence exists, and True (A) aligns with Supermicro’s chassis architecture, making it the correct answer.

References: Supermicro chassis design specs, DLC system PSU placement.

Fans in Supermicro systems, including those with DLC like the SYS-421GE-TNHR2-LCC, are powered by a power cable connecting to the fan board or motherboard. Before removing a fan from its housing, the power cable must be disconnected first to ensure safety and prevent electrical damage, a standard step in Supermicro’s service protocols. PCIe cables (A) connect expansion cards, I2C cables (C) handle communication (not fan power), and SATA cables (D) link storage drives—none are relevant to fan removal. In DLC systems, where fans may supplement liquid cooling, power disconnection remains critical, making B the verified answer.

References: Supermicro fan replacement guides, DLC hybrid cooling safety standards.

Removing the LPIO (Low-Profile IO) board from the PCIe tray in the SYS-421GE-TNHR2-LCCinvolves:

Remove PCIe air shroud: Clears access to components (standard in Supermicro designs).

Remove all AOC NIC cards: Disconnects cards on the LPIO board for unobstructed removal.

Remove metal bracket holding down LPIO board: Unscrews (typically 2 screws) the bracket securing the board.Option B follows Supermicro’s logical service order (e.g., SYS-420GP-TNAR), ensuring safe access in DLC systems. A (GPU) is unrelated, C (tray removals) is excessive, and D (fans) is irrelevant. B aligns with Supermicro’s DLC modularity, making it correct.References:Supermicro PCIe tray service guides, DLC system IO removal protocols.

Replacing the air shroud onto the motherboard tray in a Supermicro system involves securing it to the tray itself first for stability. The correct screws are those connecting the shroud directly to the motherboard tray, as outlined in Supermicro’s assembly guides (e.g., SYS-420 series). These initial screws align and anchor the shroud, ensuring proper fitment before additional connections (if any). Options B (PCIe tray) and C/D (fan board) are incorrect since the shroud’s primary attachment is to the motherboard tray, not other components. In DLC systems, precise shroud placement enhances cooling efficiency, supporting A as the correct choice.References:Supermicro motherboard tray assembly guides, DLC system component integration.

The side bracket in the SYS-421GE-TNHR2-LCC likely houses networking or management add-ons. TheAOM-PCIe card(e.g., AOM-GP401-PCIE module) andAOC NIC card(networkinterface card) are common components in Supermicro’s DLC systems, enhancing connectivity (e.g., high-speed NICs for AI workloads). A (GPU/PCIe) mixes unrelated categories, C pairs an AOM with a GPU (less likely), and D (AOC/PCIe) lacks specificity. B aligns with Supermicro’s DLC networking focus, making it correct.References:Supermicro add-on card specs, DLC system networking components.

The training focuses on Supermicro’sDirect to Chip (DLC)liquid cooling, as indicated by the context of SYS-421GE-TNHR2-LCC and Supermicro’s expertise in DLC solutions (e.g., cold plates, CDUs up to 100kW). DLC circulates coolant directly to CPUs/GPUs, reducing OPEX by 40% and supporting high-density racks. A (RDHx) cools via rear doors, B (Evaporative) uses evaporation, and C (ILC) submerges servers—none match Supermicro’s DLC emphasis here. D is the verified type.References:Supermicro DLC whitepapers, SYS-421GE-TNHR2-LCC cooling specs.

The side bracket in the SYS-421GE-TNHR2-LCC, likely housing add-on components, is secured with2 screws on the top and 2 on the side, a balanced approach seen in Supermicro’s modular designs (e.g., SYS-420GP-TNAR). This distribution ensures stability and accessibility, common in DLC systems with dense configurations. A (all top) or C (3 top) skews placement, while B (1 top) is insufficient. D aligns with Supermicro’s chassis engineering, making it correct.References:Supermicro chassis bracket guides, DLC system structural design.

Internal fans in Supermicro systems, including the SYS-421GE-TNHR2-LCC, are typically secured to their housing with 4 screws, a standard design for stability and ease of replacement (e.g., SYS-420 series manuals). This allows secure mounting while facilitating serviceability, key in DLC systems where fans support hybrid cooling. 6 screws (A) is excessive, 2 (D) insufficient for stability, and C (no screws) contradicts standard fan assembly. Supermicro’s DLC expertise ensures practical fan maintenance, making B the verified number.

References: Supermicro fan installation guides, DLC system cooling component specs.