Lenovo 4XB7A80284 3.5 16TB 7.2K SAS HS 512E HDD-SR655

Lenovo 4XB7A80284 3.5-Inch 16TB 7.2K SAS Hot-Swap Hard Drive

Overview

The Lenovo 4XB7A80284 is a 16TB, 7,200 RPM SAS hard drive in a 3.5-inch hot-swap chassis, designed for deployment in Lenovo ThinkSystem servers — the SR655 is called out in the product designation. At 16TB per spindle, this drive is aimed at high-density bulk storage workloads: surveillance video retention, backup repositories, tiered archive, and NAS-attached cold storage in enterprise rack environments. The SAS interface delivers the dual-port redundancy and command queuing depth that SAS-based storage controllers in ThinkSystem platforms expect, and the hot-swap carrier means you can pull and replace a failed unit without taking the server offline — a straightforward operational requirement for any always-on deployment.

Key Features

• 16TB Raw Capacity per Spindle: At 16TB, a fully populated 24-bay server bay yields 384TB raw before RAID overhead — meaningful for surveillance environments where continuous multi-camera recording at high resolution generates several terabytes per day. Fewer drives in the chassis also means fewer failure points compared to filling the same capacity with smaller spindles.
• 7,200 RPM SAS Interface: The SAS (Serial Attached SCSI) interface provides dual-port connectivity and deeper command queuing compared to SATA alternatives. In a ThinkSystem server with a SAS HBA or RAID controller, this translates to more predictable latency under simultaneous read/write workloads — relevant when a VMS is writing incoming streams while operators are simultaneously pulling back recorded footage for review.
• 3.5-Inch Hot-Swap Form Factor: The hot-swap carrier allows the 4XB7A80284 to be removed and reinserted while the server remains powered and running. For surveillance and operational storage that cannot tolerate maintenance windows, this eliminates the forced downtime that fixed-mount drives require.
• 512E (512-Byte Emulation) Sector Format: The 512E sector format presents 512-byte logical sectors to the host while using 4K physical sectors internally. This ensures compatibility with legacy SAS controllers and operating system storage stacks that were not written for native 4Kn drives — a practical consideration when deploying into existing ThinkSystem infrastructure rather than a greenfield build.
• SAS Command Queuing and Dual-Port Redundancy: SAS drives support Tagged Command Queuing at much greater depth than comparable SATA drives. In multi-stream workloads — concurrent ingest from a surveillance VMS plus simultaneous operator playback — deeper queuing reduces the head-seek penalty when the controller is managing competing I/O requests across the same spindle.
• ThinkSystem Platform Integration: The SR655 designation in the product name indicates this drive has been configured and validated for the Lenovo ThinkSystem SR655 server platform. Deploying Lenovo-designated drives into ThinkSystem servers avoids firmware compatibility warnings in the XClarity management console and ensures the drive is recognized natively by the onboard RAID controller without manual qualification steps.

Integration and Compatibility

This drive is identified for use with the Lenovo ThinkSystem SR655 platform. It connects via SAS to a compatible SAS HBA or RAID controller. The 512E sector format ensures compatibility with SAS controllers and OS storage drivers that require 512-byte logical addressing. Verify your RAID controller's supported drive list before deploying into a ThinkSystem generation other than the SR655. For enterprise hard drives and storage components across the Lenovo ThinkSystem catalog, confirm the target platform's storage controller supports the capacity point — some older controller firmware versions have per-drive capacity ceilings below 16TB. Pairing this drive with a compatible network video recorder or server-class NVR platform requires validating the storage controller's drive support matrix. For guidance on matching storage capacity to camera counts and retention windows, review the storage and retention planning guide.

Frequently Asked Questions

Q: What server platforms is the Lenovo 4XB7A80284 designed for?

A: The product designation specifically references the ThinkSystem SR655. Compatibility with other ThinkSystem platforms should be verified against Lenovo's ServerProven compatibility database for the target server model and RAID controller firmware version.

Q: What is the sector format of the 4XB7A80284, and does it matter for my deployment?

A: This drive uses 512E (512-byte emulation) sector format. It presents 512-byte logical sectors to the host, ensuring compatibility with SAS controllers and operating systems that do not support native 4Kn (4096-byte) sectors. If your controller and OS stack are native-4Kn capable, 512E is still fully compatible — it adds no functional limitation.

Q: Is this a hot-swap drive, and what does that mean for installation?

A: Yes. The HS (hot-swap) designation means the drive ships in a hot-swap tray compatible with the ThinkSystem SR655's drive bays. You can insert or remove the drive while the server is powered on, provided the RAID controller supports hot-swap operations (standard on ThinkSystem platforms). No server shutdown is required for drive replacement.

Q: What interface does the 4XB7A80284 use — is it compatible with SATA backplanes?

A: This drive uses a SAS interface. SAS and SATA use physically similar connectors but are not interchangeable — SAS drives will not function on SATA-only backplanes. Confirm the SR655 or target server is configured with a SAS backplane and SAS-capable RAID controller before ordering.

Q: How much does the 4XB7A80284 weigh, and does that affect rack density planning?

A: The drive weighs 10 lb. For a fully populated 24-bay 2U server, factor approximately 240 lb of drive weight alone into rack load calculations, in addition to the server chassis and power supplies. This is a meaningful consideration for high-density storage racks where floor load ratings matter.

Ted Perry

The 4XB7A80284 is a straightforward high-capacity SAS spindle — 16TB, 7.2K RPM, 3.5-inch hot-swap — and the detail that matters most for purchasing decisions is the SAS interface combined with the 512E sector format. SAS is not a drop-in for SATA environments, and if you're specifying this drive for a ThinkSystem SR655 build, confirming the backplane type and RAID controller firmware version before the PO goes out saves a return cycle.

Technical Highlights:

• 16TB SAS Capacity: At 16TB per spindle, this is a high-density option for bulk-write workloads. In a surveillance context, a single drive at typical H.265 bitrates can hold several months of single-camera continuous recording — the math shifts quickly when you're populating a full bay.
• Hot-Swap Carrier (HS): The hot-swap designation means physical drive replacement does not require server shutdown. On a RAID 6 or RAID 60 array, a failed drive can be pulled and a replacement inserted while recording continues — operationally critical for surveillance storage that must not go dark during maintenance.
• 512E Sector Format: The 512-byte emulation layer is specifically there to maintain compatibility with SAS controllers that pre-date native 4Kn support. It adds no performance penalty in normal operation and ensures the drive is recognized without driver-level workarounds on existing ThinkSystem infrastructure.

Deployment Considerations:

• Verify the target ThinkSystem RAID controller's maximum supported drive capacity before ordering — some controller firmware versions below a certain release level have a 14TB or 16TB ceiling; check Lenovo's ServerProven matrix for the exact controller model and firmware revision in your SR655 configuration.
• At 10 lb per drive, rack load planning matters in high-density builds. A fully loaded 24-bay chassis with 4XB7A80284 drives will add significant weight to the rack — confirm rail ratings and floor load capacity before populating a full shelf.

This drive is the right specification for ThinkSystem SR655 deployments where bulk sequential write capacity is the priority — surveillance video repositories, backup targets, and tiered archive pools where spindle cost-per-terabyte matters more than the low-latency access patterns that SSD tiers handle.