Lenovo 7XB7A00042 Thinksystem 3.5 2TB 7.2K SAS 12GB HOT Swap 512N HDD

Lenovo 7XB7A00042 ThinkSystem 3.5" 2TB 7.2K SAS 12Gb/s Hot-Swap 512n HDD

The Lenovo 7XB7A00042 is a 2TB, 7,200 RPM, 3.5-inch SAS hard drive built for ThinkSystem servers and workstations where continuous availability and fast sequential throughput matter more than flash-tier latency. With a 12 Gb/s SAS interface and native hot-swap support, this drive slots into compatible Lenovo ThinkSystem storage bays without a maintenance window — a practical requirement in production environments that can't absorb unplanned downtime. If you're populating a network video recorder chassis, a surveillance server, or a general-purpose ThinkSystem storage node, this is the spindle-class drive to consider for high-capacity, always-on workloads.

Key Features

• 2TB Capacity at 7,200 RPM: Two terabytes at 7.2K RPM delivers the write throughput spindle HDDs need to sustain continuous recording or database logging without buffer stalls. For NVR deployments running 16–32 channels at 4K, a single 7XB7A00042 handles roughly 30–60 days of retention depending on bitrate and compression — plan your drive count around retention targets, not just raw capacity.
• 12 Gb/s SAS Interface: SAS at 12 Gb/s doubles the raw bus bandwidth of a 6 Gb/s SATA link and provides full-duplex transfers — meaning reads and writes can occur simultaneously without contention. In a multi-drive RAID array, that headroom keeps the controller from becoming the bottleneck under mixed read/write I/O patterns typical of surveillance or database workloads.
• Native Hot-Swap Support: The 3.5-inch SAS carrier is designed for hot-swap — pull a failed drive and seat a replacement without powering down the host system. For 24/7 security or operations infrastructure, this is the difference between a sub-minute swap and a scheduled maintenance event. Verify your ThinkSystem chassis supports hot-swap bays before ordering (most 2U+ ThinkSystem servers do).
• 512n Sector Format: The 512-byte native sector format ensures compatibility with older RAID controllers and HBAs that don't yet support 4K native (4Kn) drives. If your ThinkSystem server was commissioned before 2018, 512n is the safer choice — 4Kn drives can cause initialization failures on legacy firmware stacks.
• 5V/12V Dual-Voltage Operation: Standard dual-rail power draw (5V logic + 12V spindle) is compatible with any ThinkSystem backplane power connector. No adapters, no voltage converters — straightforward installation in any compatible bay.
• SAS + Ethernet Dual Interface Listing: The distribution feed lists both SAS and Ethernet interfaces. The primary data interface for this drive is SAS 12 Gb/s. Ethernet in this context likely references management or out-of-band connectivity at the system level — the drive itself connects via SAS to the server backplane.
• 2.15 lb Drive Weight: At 2.15 lbs, standard 3.5-inch SAS drive mass — relevant if you're calculating populated chassis weight for rack load ratings. A fully loaded 24-bay 2U chassis with drives at this weight adds roughly 52 lbs to your rack load calculation.

Integration & Compatibility

The 7XB7A00042 is a Lenovo ThinkSystem-branded drive, sourced for use in Lenovo's ThinkSystem server lineup. SAS 12 Gb/s drives require a compatible SAS HBA or RAID controller — standard SATA ports will not accept a SAS connector. Confirm your ThinkSystem server's storage backplane supports 3.5-inch large-form-factor (LFF) bays; some 1U chassis are SFF (2.5-inch) only.

For server storage deployments running surveillance workloads, pair this drive with a ThinkSystem RAID controller configured in RAID 5 or RAID 6 to protect against single- or dual-drive failures respectively — important in NVR environments where continuous write cycles accelerate drive wear relative to general-purpose servers. Review Lenovo's storage planning resources or consult with a pre-sales engineer to confirm RAID controller compatibility before populating a new chassis.

The 512n sector format is broadly compatible across ThinkSystem RAID controllers, including the SR530, SR550, SR630, SR650, and ST550 platforms. If you are deploying alongside existing 512n drives in an existing RAID group, this drive is a straightforward replacement or expansion candidate without sector-size mismatch concerns.

Frequently Asked Questions

Q: Is the Lenovo 7XB7A00042 compatible with non-Lenovo servers?

A: This drive uses a standard SAS 12 Gb/s interface and 3.5-inch form factor, so it will physically connect to any compatible SAS backplane. However, it is a Lenovo ThinkSystem-branded drive — some non-Lenovo servers with locked firmware may flag third-party drives or restrict functionality. Verify your target server's drive compatibility list before deploying in a non-Lenovo chassis.

Q: Does the 7XB7A00042 support hot-swap replacement?

A: Yes. The drive is designed for hot-swap operation, meaning you can remove and replace it while the host server remains powered on — provided the server chassis and RAID controller also support hot-swap, which most ThinkSystem 2U+ platforms do.

Q: What is the sector size of this drive?

A: The 7XB7A00042 uses 512n (512-byte native) sector format. This is the legacy-compatible sector size and works with virtually all SAS RAID controllers and HBAs, including older ThinkSystem firmware stacks that do not support 4K native drives.

Q: What interface does this drive use — SAS or SATA?

A: SAS 12 Gb/s. SAS and SATA connectors are not interchangeable — you need a SAS backplane or HBA. SATA ports will not accept this drive's connector.

Q: Is this drive suitable for NVR or surveillance recording workloads?

A: The 7,200 RPM spindle speed and SAS 12 Gb/s interface make it suitable for continuous-write workloads such as NVR recording. That said, this is a standard enterprise HDD — for high-channel-count NVR deployments, consider drives explicitly rated for surveillance duty cycles (typically rated for higher annual workload hours). Confirm workload specifications with your storage vendor if sustained 24/7 multi-stream recording is the primary use case.

Q: What is the operating voltage for the 7XB7A00042?

A: The drive operates on standard dual-rail power: 5V (logic) and 12V (spindle motor). This matches the standard SAS/SATA backplane power connector used in all ThinkSystem server platforms.

Jerry Tildsen

The spec that defines this drive's deployment fit is the 12 Gb/s SAS interface combined with the 512n sector format — together, they tell you this 7XB7A00042 is built for ThinkSystem environments where the RAID controller is SAS-native and the firmware predates widespread 4Kn adoption. That combination is more common than most integrators expect in active production deployments.

Technical Highlights:

• SAS 12 Gb/s Full-Duplex Interface: Unlike SATA, SAS supports simultaneous read and write operations — critical in RAID arrays under mixed I/O load. At 12 Gb/s, the bus won't be the constraint in any realistic spinning-disk scenario.
• Hot-Swap Capable: Designed to pull and replace without a power cycle. In a ThinkSystem chassis with hot-swap bays and an active RAID set, a failed drive swap triggers automatic rebuild — no window required.
• 512n Sector Format: Legacy-compatible native sector size. Drops into any ThinkSystem RAID group alongside existing 512n drives without sector-size mismatch errors that would otherwise require a full array rebuild.

Deployment Considerations:

• Confirm your ThinkSystem chassis uses LFF (3.5-inch) bays — SFF (2.5-inch) chassis are increasingly common in 1U configurations and will not accept this drive without a tray adapter that Lenovo typically does not support or recommend.
• This is a standard enterprise HDD, not a drive explicitly rated for NVR surveillance duty cycles. If your deployment is continuous 24/7 multi-stream recording at high bitrates, verify the annual workload rating matches your expected write volume before committing to this SKU at scale.

Best fit: ThinkSystem servers in security operations centers, mid-sized NVR installations, or general-purpose storage nodes where SAS 12 Gb/s RAID infrastructure is already in place and the team needs a straightforward, hot-swap-capable LFF expansion drive without converting the array to a different sector format.