Lenovo 4XB7A77446 ST50 V2 3.5" 2TB 7.2K 6Gb NHS HDD

Lenovo 4XB7A77446 3.5-Inch 2TB 7.2K SATA Server Hard Drive

Overview

The Lenovo 4XB7A77446 is a 2TB, 7,200 RPM, 3.5-inch SATA hard drive sourced factory-new and validated for the Lenovo ThinkSystem server lineup — specifically the ST50 V2 tower server. If you're expanding storage in an ST50 V2 for file serving, backup targets, or local surveillance recording, this is the drive Lenovo qualifies and tests for that chassis. Non-hot-swap (NHS) design means installation happens with the server powered down, which is standard practice for a tower-class workstation server of this type.

The drive ships as a 512n (512-byte native sector) device, which matters for compatibility with older RAID controllers and HBAs that do not support 512e or 4Kn sector formats. If your ST50 V2 environment includes legacy controller firmware, 512n is the safe choice — no sector-translation overhead, no compatibility surprises.

Key Features

• 2TB Formatted Capacity: Enough headroom for a workgroup file server, a local backup repository, or a multi-camera NVR archive at moderate retention windows — without the per-drive cost premium of higher-capacity enterprise drives when the workload doesn't demand it.
• 7,200 RPM Spindle Speed: Faster than 5,400 RPM NAS drives, which translates to lower latency on random reads and better sustained throughput for mixed read/write workloads. Relevant if the ST50 V2 is running an application with concurrent access patterns rather than a pure cold-archive role.
• SATA 6 Gb/s Interface: The 6 Gb/s SATA III interface is backward compatible with SATA II (3 Gb/s) controllers, so the drive works in any SATA bay the ST50 V2 offers. Real-world throughput on a 7.2K spinning drive is well below the 6 Gb/s ceiling, so the interface is never the bottleneck.
• 3.5-Inch Large Form Factor: Fits the standard LFF bays on the ST50 V2 without adapters or sleds beyond what Lenovo ships with the chassis. Confirm your available LFF bay count before ordering multiples.
• 512n Sector Format: Native 512-byte sectors ensure compatibility across legacy and modern RAID/HBA configurations without emulation layers. If you're running older controller firmware that chokes on 512e drives, 512n eliminates that variable entirely.
• Non-Hot-Swap (NHS) Design: The NHS designation is appropriate for tower servers where planned maintenance windows are the norm. If your application requires drive replacement under power, look at hot-swap variants instead — the ST50 V2 supports both, depending on configuration.
• Lenovo System Validation: Drives sold under Lenovo part numbers like 4XB7A77446 are validated against the ThinkSystem platform, meaning firmware compatibility, thermal envelope, and vibration characteristics have been tested for the target chassis — reducing the risk of drive errors that can appear with unvalidated third-party drives in enterprise servers.

Integration and Compatibility

The 4XB7A77446 is qualified for the ThinkSystem ST50 V2 tower server. Before ordering, verify the number of available 3.5-inch LFF bays remaining in your unit and confirm you are not exceeding the controller's maximum drive count. The NHS interface requires a scheduled power-down for installation — plan accordingly in production environments.

For organizations building out network video recorder storage on an ST50 V2, this drive pairs well with surveillance-optimized workloads: continuous sequential writes from multiple camera streams are a good fit for a 7.2K SATA drive at this capacity tier. If you need higher density or a hot-swap capable configuration, evaluate higher-capacity LFF options within the Lenovo storage drive portfolio to match your retention requirements.

When deploying multiple drives in the same chassis for a RAID array or JBOD, sourcing matched part numbers ensures uniform firmware revisions and sector formatting across the array — relevant for RAID rebuild predictability and long-term drive health monitoring through Lenovo's XClarity management stack.

For broader storage planning in rack or tower server environments, a server storage planning guide can help size capacity and redundancy requirements before committing to a drive count.

Frequently Asked Questions

Q: What server is the Lenovo 4XB7A77446 compatible with?

A: The 4XB7A77446 is validated for the Lenovo ThinkSystem ST50 V2 tower server. Always confirm available LFF bay count in your specific ST50 V2 configuration before ordering.

Q: Is the 4XB7A77446 a hot-swap drive?

A: No. The NHS (Non-Hot-Swap) designation means the drive must be installed with the server powered down. If your application requires live drive replacement, look for hot-swap variants in the Lenovo ThinkSystem drive lineup.

Q: What sector format does the 4XB7A77446 use?

A: The drive uses 512n (512-byte native) sector format. This is compatible with legacy RAID controllers and HBAs that do not support 512e or 4Kn drives, making it a low-risk choice for mixed-age infrastructure.

Q: What is the interface and transfer rate for the 4XB7A77446?

A: The drive uses a SATA 6 Gb/s (SATA III) interface, which is backward compatible with SATA II controllers. Real-world throughput on a 7,200 RPM spinning drive operates well below the 6 Gb/s interface ceiling.

Q: Can the 4XB7A77446 be used for surveillance recording?

A: Yes. The 7,200 RPM spindle speed and 2TB capacity make it suitable for continuous-write workloads typical of multi-camera NVR deployments running on an ST50 V2. Confirm your camera count and retention window to size total drive capacity appropriately.

Eden Phillips

The 4XB7A77446 is one of those drives that makes sense precisely because of what it is not trying to do. It is a 2TB, 7,200 RPM, NHS SATA drive qualified for a specific chassis — the ThinkSystem ST50 V2 — and its value is in that validation, not in headline specs. When you pull a Lenovo-badged drive for an ST50 V2, you are getting a part that has been through Lenovo's firmware and thermal compatibility testing for that server, which matters more than most buyers realize until they hit a drive error on an unqualified third-party unit six months post-deployment.

Technical Highlights:

• 512n Sector Format: Native 512-byte sectors eliminate the compatibility questions that come with 512e drives on older RAID controllers — no translation layer, no firmware edge cases. If your environment includes legacy HBA firmware, this is the spec to care about.
• 6 Gb/s SATA III Interface: Backward compatible with SATA II controllers, so it drops into any SATA bay the ST50 V2 offers. A 7.2K spinning drive saturates at well under 300 MB/s sustained, so the interface headroom is never the constraint.
• 7,200 RPM vs. 5,400 RPM: The higher spindle speed meaningfully reduces rotational latency on mixed-access workloads — relevant for an ST50 V2 handling concurrent reads and writes, like a small NVR or file server under active use rather than cold archiving.

Deployment Considerations:

• NHS means planned downtime for installation. If you are deploying this into a production ST50 V2 with no redundancy, schedule the maintenance window before ordering — there is no online swap option here.
• At 2TB, this drive is appropriate for moderate camera counts or short-to-medium retention windows. Size up to higher-capacity Lenovo LFF drives if your recording requirements exceed what 2TB can hold at your target retention depth — running a drive to capacity under constant write pressure shortens its operational life.

This drive is a practical fit for an ST50 V2 deployed as a small-site NVR or workgroup file server where validated compatibility matters more than raw capacity or enterprise-grade endurance ratings — a branch office security server, a retail back-office recorder, or a light manufacturing floor data collection node.