Pass the Supermicro Liquid Cooled Servers SDLCSA Questions and answers with ValidTests

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.

The air shroud in Supermicro systems, including those with Direct Liquid Cooling (DLC) solutions like the SYS-421GE-TNHR2-LCC, is typically designed to direct airflow (or in hybrid systems, assist with liquid cooling efficiency) and is made of plastic or composite materials. Based on Supermicro’s standard design practices seen in technical documentation and product images (e.g., SYS-420GP-TNAR, a similar GPU server with DLC), the PCIe tray’s air shroud is consistently black. This color aids in heat absorption and dissipation, aligning with Supermicro’s focus on thermal efficiency in DLC systems, where cold plates and coolant distribution units (CDUs) manage heat directly at the chip level. White or clear shrouds are less common due to aesthetic and thermal considerations, and “opaque” is not a specific color designation. Thus, black is the correct choice, reflecting Supermicro’s engineering standards for high-performance computing components.References:Supermicro product images and manuals (e.g., SYS-420GP-TNAR User Manual), general DLC solution descriptions.

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 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 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.

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 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.

Reseating the PCIe tray in a Supermicro system like the SYS-421GE-TNHR2-LCC involvesaligning it with the chassis and locking it in place. Per Supermicro’s design (e.g., SYS-420GP-TNAR), the tray has levers that start in the down (unlocked) position during insertion. When fully seated, these levers automatically move up to the locked position, clicking into place to secure the tray and ensure proper connection to power and cooling (e.g., DLC manifolds). Option A (sticking out) indicates incomplete insertion, B (slightly up) is insufficient, and C (up to down) reverses the mechanism. D reflects Supermicro’s DLC system precision, ensuring tray stability.References:Supermicro PCIe tray installation guides, DLC component alignment standards.

Replacing a PSU in Supermicro’s SYS-421GE-TNHR2-LCC follows a detailed, safety-focused process:

Lift the red lock to unlock the release lever: Red is a common Supermicro color for PSU locks.

Lift the release lever and use it to pull out the failed PSU: Standard hot-swap mechanism.

Replace the failed PSU with a new one: Swap the unit.

Ensure the gold connector pins are on the top: Correct orientation for connection.

Push the new PSU into the tray: Slide it in fully.

Push the release lever down and in until it clicks: Locks the PSU.

Ensure the red lock is locked: Confirms security.

Option B covers all steps comprehensively, aligning with Supermicro’s DLC system PSU replacement (e.g., SYS-420 manuals). A is incomplete, C reverses steps, and D skips locking, making B correct.

References: Supermicro PSU replacement guides, DLC system power protocols.

Removing the motherboard tray from the SYS-421GE-TNHR2-LCC involves:

Loosen 2 screws on both ends of the front of the chassis: Secures latches, per Supermicro’s design (e.g., SYS-420GP-TNAR).

Pull down on the latches until they release completely: Frees the tray.

Slowly start pulling the tray out: Initiates removal.

Release the safety latches on both sides: Prevents dropping (DLC safety feature).

Lift and move the quick connect cables: Clears DLC coolant or power lines.

Continue pulling out the tray: Completes removal.Option D is the most comprehensive, matching Supermicro’s DLC system protocols. A skips screws and cables, B (12 screws) and C (8 screws) exaggerate screw count, lacking safety steps. D ensures safe, complete removal.References:Supermicro motherboard tray removal guides, DLC system safety features.