SDLCSA Sample Questions Answers

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.

The LPIO (Low-Profile IO) board and BMC cable in Supermicro systems are typically secured by a minimal number of screws for quick serviceability, a principle in DLC designs like the SYS-421GE-TNHR2-LCC. Based on similar systems (e.g., SYS-420GP-TNAR), the metal bracket holding these components is fastened with 2 screws, balancing security and ease of access. Higher counts like 8 (A), 5 (B), or 6 (D) are excessive for a small bracket, while 2 (C) matches Supermicro’s standard for IO-related brackets. In DLC contexts, modularity is key, supporting C as the verified number.

References: Supermicro IO board installation guides, DLC system service efficiency.

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.

The air shroud on the PCIe tray in Supermicro systems like the SYS-421GE-TNHR2-LCC is positioned to optimize airflow or assist liquid cooling efficiency in hybrid setups. Per Supermicro’s design (e.g., SYS-420GP-TNAR), the shroud is located on the top/center of the PCIe tray, covering the cards to direct cooling effectively across components. This central placement ensures even distribution, critical in DLC systems where air may still cool non-liquid-cooled parts. Options B and D (right/left) are less practical for uniform coverage, and A (bottom) contradicts standard shroud placement above components. Supermicro’s DLC expertise integrates air shrouds strategically, making C the verified location.References:Supermicro PCIe tray diagrams, DLC solution design principles.

The fan board in Supermicro systems, including the SYS-421GE-TNHR2-LCC with DLC, manages cooling (even in hybrid air/liquid setups). The removal process, per Supermicro’s service manuals, involves:

Disconnect the power supply from all the fans: This ensures safety and prevents damage, a critical step in DLC systems where fans may supplement liquid cooling.

Pull up on the blue levers on each side of the fan board to unlock it: Blue levers are a common Supermicro design feature for releasing components securely.

Pull the fan board straight up and out of the tray: Once unlocked, the board is lifted free.Option B includes all necessary steps. A skips disconnection and unlocking, C omits the levers, and D misses power disconnection, risking damage. Supermicro’s DLC solutionsemphasize safe maintenance, supporting B as the correct procedure.References:Supermicro motherboard tray service guides, DLC system maintenance protocols.

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.

In Supermicro systems like the SYS-421GE-TNHR2-LCC, M.2 drives are typically mounted on the motherboard for fast storage in high-performance computing (HPC) and AI workloads, often cooled indirectly by DLC systems. To access the M.2 drive, you must:

Remove the motherboard tray from the chassis: This exposes the motherboard where M.2 slots reside.

Remove the air shroud from the motherboard tray: The shroud covers components for airflow or hybrid cooling, and its removal provides access to the M.2 slot.

Option D aligns with Supermicro’s design, as seen in manuals (e.g., SYS-420GP-TNAR), where M.2 drives are motherboard-mounted. A is incorrect since M.2 drives are serviceable; B (GPU tray) and C (fan housing) don’t house M.2 drives in this context. Supermicro’s DLC solutions prioritize motherboard accessibility, making D the correct procedure.

References: Supermicro motherboard tray manuals, DLC system component layouts.

In Supermicro systems like the SYS-421GE-TNHR2-LCC, the air shroud on the motherboard tray is typically a lift-off component not obstructed by a support bar. Unlike some designs with structural bars, Supermicro’s high-end servers (per manuals like SYS-420GP-TNAR) often feature open tray layouts for easy access, especially in DLC configurations where liquid cooling reducesreliance on complex air channels. Options A, B, and C assume a bar exists and must be removed, but no such requirement is standard. The shroud lifts off after screw removal, making D correct. Supermicro’s DLC design simplifies maintenance, supporting this conclusion.References:Supermicro motherboard tray documentation, DLC system accessibility features.

The AOM (Add-On Module) cage in the SYS-421GE-TNHR2-LCC is secured with2 screws on the top and 2 on the side, a balanced approach in Supermicro’s modular designs (e.g., SYS-420GP-TNAR). This ensures stability and accessibility in DLC systems. A and B skew placement, while C (all top) ignores side support. D matches Supermicro’s chassis engineering, making it correct.References:Supermicro AOM cage specs, DLC system structural design.