Lenovo 4Y37A78834

Overview

The Lenovo 4Y37A78834 is a RAID adapter designed to connect SAS and SATA drives through a PCIe 4.0 x8 interface, delivering 12 Gbps connectivity for both drive types. Built on the Broadcom MegaRAID 9540 chipset, this cacheless adapter supports RAID 0, RAID 1, RAID 10, and JBOD configurations, making it a practical choice for small to medium businesses that need flexible storage options with cost-effective data protection. It can manage up to 63 physical drives with a SAS expander and supports up to 32 virtual drives, providing scalability for growing storage demands.

Key features

• PCIe 4.0 x8 interface ensures fast data transfer rates and compatibility with modern servers
• Supports RAID 0, 1, 10, and JBOD modes to balance performance, redundancy, and direct disk access
• Cacheless design reduces complexity and overhead, simplifying management and improving reliability
• Ability to mix SAS and SATA drives in separate arrays allows reuse of existing disks alongside new additions
• Supports 512e, 512n, and 4K sector formats, ensuring compatibility with a wide range of drives
• UNMAP and TRIM command support optimizes SSD performance and longevity
• Compatible with major operating systems including Windows Server, Red Hat Enterprise Linux, SUSE Linux Enterprise Server, and VMware ESXi
• Fixed 64 KB stripe size simplifies configuration and maintains consistent performance

Key specs

• Host interface: PCIe 4.0 x8
• Drive interface: 12 Gbps SAS and SATA
• RAID levels supported: 0, 1, 10, JBOD
• Chipset: Broadcom MegaRAID 9540
• Maximum physical drives: 63 (with SAS expander)
• Maximum virtual drives: 32
• Stripe size: fixed 64 KB
• Supported sector formats: 512e, 512n, 4K
• Operating system compatibility: Windows Server, Red Hat Enterprise Linux, SUSE Linux Enterprise Server, VMware ESXi

Connectivity and compatibility

This RAID adapter connects via a PCIe 4.0 x8 slot, providing high bandwidth for demanding storage tasks. It supports both 12 Gbps and 6 Gbps SAS and SATA drives, allowing integration with a variety of existing hardware. The ability to manage up to 63 physical drives through a SAS expander makes it suitable for expanding storage arrays without replacing the controller. Its broad OS compatibility ensures it fits well into diverse IT environments running Windows, Linux, or VMware platforms.

Ideal uses and environments

This adapter is well suited to small and medium businesses that require reliable RAID protection without the complexity of cache management. It works effectively in virtualization hosts running ESXi or Linux, where RAID 10 offers a balance of performance and resilience. For file or application servers needing simple redundancy, RAID 1 provides mirrored protection. RAID 0 is available for workloads that prioritize speed over redundancy, while JBOD mode supports software-defined storage or backup solutions that require direct disk access. Its flexibility in mixing SAS and SATA drives helps organizations optimize costs by reusing existing drives alongside new capacity.

Orders are processed within 2 business days, which includes verification, packing, and dispatch. Shipping costs are calculated at checkout based on destination, total weight, and selected speed. Free shipping applies to carts over $100 (excluding heavyweight items). All available options and final pricing are clearly shown before payment so you can choose the service that best fits your needs.

Deliveries are handled by major carriers such as USPS, UPS, and FedEx. Estimated delivery times are displayed at checkout and may vary depending on service level and location. Please note that these are estimates and can be affected by weather, holidays, or carrier volume. Once your order ships, you’ll receive a tracking number for real-time updates from pickup to final delivery.

Providing an accurate shipping address helps prevent delays, and changes may be limited once the order has been dispatched. P.O. boxes are supported only when permitted by the selected carrier. Packaging and handoff are optimized to protect items during transit, though oversized or high-weight products may require special handling. All shipping methods and any related constraints are clearly shown during checkout.

Learn more

Returns are accepted within 30 days of delivery. Items must be unused, in the same condition received, with tags, manuals, accessories, and original, unaltered packaging. Any item kept will be deducted from the refund. Start a return by sending us an email. Items sent back without approval may be refused or returned to the sender.

Some items are not returnable: opened TVs/combos/monitors 37″+, opened computers or software, electronic downloads, opened consumables (film, paper, bulbs, media, ink), custom or modified computers, special-order or “nonreturnable” items, submerged underwater gear, and opened educational media.

After inspection, refunds are issued to the original payment method; allow 5–7 business days for the credit to post. Shipping, handling, customs duties, and import taxes are nonrefundable. If an item is used, incomplete, or not in original condition, a 30% restocking fee may apply. Direct exchanges are not offered; purchase the replacement and return the original for a refund.

We act solely as a reseller. Any product warranty is provided and administered by the manufacturer, not by our store. That means eligibility, coverage, and outcomes are determined by the manufacturer’s policy for each brand and model. Before purchasing, we recommend reviewing the warranty terms on the manufacturer’s website or in the product documentation to confirm what is covered and for how long.

If you need warranty service, please file the claim directly with the manufacturer. They may require proof of purchase, the product serial number, original packaging, photos, or basic troubleshooting. Some brands ask you to register the product or obtain a case number before shipping it for repair or replacement. We don’t submit or approve claims, but we can point you to the correct support links and contact details.

Keep your invoice and packaging in a safe place, and report any functional issues to the manufacturer as soon as they appear. If you’re unsure whether a problem is covered, the manufacturer’s support team can confirm next steps and timelines. While we cannot intervene in decisions or outcomes, we’re happy to provide purchase documentation or guidance so you can move through the warranty process smoothly.

Learn more