Lenovo 4XB7A77452 ST50 V2 3.5 5300 480GB 6GB NHS SSD

Lenovo 4XB7A77452 ST50 V2 480GB 3.5-Inch Non-Hot-Swap SSD

Overview

The Lenovo 4XB7A77452 is a 480GB 3.5-inch SATA SSD engineered specifically for the Lenovo ThinkSystem ST50 V2 tower server platform. It uses 3D TLC NAND flash and delivers 85,000 read IOPS and 36,000 write IOPS — performance that meaningfully accelerates OS boot, database index reads, and application load times compared to spinning-disk alternatives in the same bay. If you're spec'ing storage for a small-business file server, light virtualization host, or branch-office workstation, this drive is sized and validated for exactly that workload tier.

It ships in a non-hot-swap (NHS) configuration, which is the standard for the ST50 V2's single-socket tower chassis — the drive fits the 3.5-inch bay without a hot-swap backplane, keeping the bill of materials lean for deployments that don't require live-swap capability during production hours.

Key Features

• 480GB 3D TLC NAND: 3D TLC stacks memory cells vertically to pack more capacity into the same silicon footprint without sacrificing the endurance headroom needed for mixed read/write server workloads. At 480GB, you get enough room for a full OS installation, application stack, and working data — without paying for enterprise-tier capacity you won't use on an entry server.
• 85,000 Random Read IOPS (4K): That's roughly 6–8× what a 7,200 RPM nearline hard drive delivers under random-access patterns. In practice, this means faster Active Directory lookups, snappier VM guest boot times, and reduced queue depth under simultaneous multi-user access — all relevant on a tower server handling a small team's shared workloads.
• 36,000 Random Write IOPS (4K): Write performance matters most during database commits, log writes, and backup jobs. At 36K IOPS, the drive won't become the bottleneck during nightly backup windows or concurrent write sessions that are common on entry SMB servers.
• 175 µs Read Latency / 100 µs Write Latency: Sub-millisecond latency on both read and write paths means the CPU isn't sitting idle waiting on storage. For an application server handling synchronous requests, this translates directly into lower end-user response times.
• 3,000,000-Hour MTBF: A 3-million-hour mean time between failures rating reflects the drive's expected reliability profile under continuous server operation. That's not a guarantee, but it's the design target — and it's the figure you'd cite when comparing storage reliability tiers to a customer or facilities manager.
• Low Power Draw — 2.5W Read / 3.1W Write: An SSD at this power envelope produces significantly less heat than a spinning disk, which matters in a compact tower chassis with limited airflow. Lower thermals mean less fan noise and reduced wear on chassis cooling components over a multi-year deployment.
• S.M.A.R.T. Support: Built-in Self-Monitoring, Analysis and Reporting Technology lets the server's management tools (and Lenovo XClarity, if deployed) surface predictive failure indicators before a drive fails unexpectedly. In a non-redundant single-drive configuration — which is typical for the ST50 V2 — early warning is the only safety net you have short of a full backup strategy.
• 3.5-Inch Form Factor, 7mm Height: The physical dimensions (70mm × 100mm × 7mm) fit directly into the ST50 V2's standard 3.5-inch bay. No adapter bracket needed. The 7mm height also means there's no interference with adjacent bays on configurations running multiple drives.

Integration & Compatibility

The 4XB7A77452 carries a Lenovo ThinkSystem part number, meaning it's sourced and validated for the Lenovo server line — specifically the ST50 V2 as denoted in the product designation. Lenovo's option compatibility matrix ties this drive to the ST50 V2 chassis; installing it in a different server platform (even another Lenovo model) may work electrically but won't carry the same validation status. If you're deploying into a different ThinkSystem platform, verify compatibility against Lenovo's ServerProven database before ordering.

The non-hot-swap designation means the server must be powered down to install or replace this drive. For environments where uptime requirements are strict enough to require live drive replacement, the correct path is a hot-swap backplane and a hot-swap-compatible drive variant — not this SKU. Plan maintenance windows accordingly.

S.M.A.R.T. telemetry integrates with standard server management stacks. If the ST50 V2 is managed via Lenovo XClarity Administrator, drive health events will surface through the same dashboard as other hardware alerts — no separate monitoring agent needed.

For deployments pairing this drive with a network-attached storage or backup appliance, the 2.5W/3.1W power profile means it won't push the ST50 V2's internal power budget even when running alongside additional storage or PCIe expansion cards.

Frequently Asked Questions

Q: Is the Lenovo 4XB7A77452 compatible with servers other than the ST50 V2?

A: This drive carries a part number validated for the Lenovo ThinkSystem ST50 V2. It may function in other servers with a standard 3.5-inch SATA bay, but compatibility outside the ST50 V2 has not been verified for this SKU. Check Lenovo's ServerProven compatibility matrix before deploying in a different chassis.

Q: Does the 4XB7A77452 support hot-swap replacement?

A: No. The NHS (Non-Hot-Swap) designation means the server must be powered down before installing or removing this drive. If your deployment requires live drive replacement without downtime, you'll need a hot-swap capable drive variant and a chassis with a hot-swap backplane.

Q: What NAND type does this SSD use, and what does that mean for endurance?

A: The drive uses 3D TLC (Triple-Level Cell) NAND. 3D TLC offers good density and endurance for mixed read/write server workloads at the entry tier — appropriate for OS, applications, and working data on a small business or branch-office server. It's not positioned for write-intensive database workloads that would demand enterprise MLC or SLC media.

Q: What is the MTBF rating for the 4XB7A77452?

A: The rated MTBF is 3,000,000 hours. This is a statistical reliability figure based on population testing — not a per-unit guarantee — but it reflects the design target for continuous server operation across the expected product lifecycle.

Q: Does this drive include S.M.A.R.T. monitoring support?

A: Yes. S.M.A.R.T. is supported, allowing the server's management tools to surface predictive drive health indicators. On an ST50 V2 managed via Lenovo XClarity, drive status will appear alongside other hardware health metrics without requiring a separate monitoring agent.

Q: How much power does the 4XB7A77452 consume?

A: Power draw is 2.5W during read operations and 3.1W during write operations. This low thermal footprint reduces heat load inside the ST50 V2 chassis and contributes to quieter fan operation compared to spinning-disk alternatives.

Ted Perry

The 4XB7A77452 is one of those parts that's easy to overlook but gets the job done precisely where it's needed. I focus on the 85,000 read IOPS rating when I'm spec'ing this — for an entry tower server like the ST50 V2, that figure means the OS and application layer come up fast and stay responsive under the kind of multi-user file access and light virtualization loads these platforms are typically sized for.

Technical Highlights:

• 3D TLC NAND at 480GB: The right capacity for an entry-server OS+application drive — enough headroom to avoid constant cleanup, not so large you're paying for enterprise-class capacity on a tower deployment that doesn't justify it.
• Sub-millisecond latency (175 µs read / 100 µs write): For synchronous workloads — think Active Directory authentication, file share access, or a local SQL instance handling small queries — these latency figures keep the CPU and application threads from stalling on storage I/O.
• 3,000,000-hour MTBF: On a non-redundant, non-hot-swap single-drive configuration, MTBF is essentially your reliability backstop. Pair this with a solid off-site backup discipline and you're in a defensible position for a branch-office deployment.

Deployment Considerations:

• NHS means planned downtime for any drive service. Schedule a maintenance window and communicate it to end users — this isn't the drive for a 24/7 zero-downtime requirement.
• The 7mm drive height fits the ST50 V2 bay directly with no adapter, but double-check Lenovo's ServerProven list if you're ordering spares for a mixed-chassis environment — the part number is validated for the ST50 V2 specifically.

This is the right drive for a small-business or branch-office ST50 V2 deployment where the priority is reliable, responsive local storage under everyday mixed workloads — not a high-write database or a chassis that needs live-swap storage management.