Lenovo 4XH7A61129 SR655 Mid Backplane X40 Cable Kit

Overview

The Lenovo 4XH7A61129 is a factory-new backplane cable kit designed for the ThinkSystem SR655 server, supporting both 2.5-inch and 3.5-inch drive configurations across 4-bay and 8-bay mid backplane deployments with X40 connectivity. If you are expanding or replacing the internal storage cabling in an SR655 chassis, this is the Lenovo-matched component to maintain signal integrity and chassis compatibility — using off-brand or generic substitutes in a high-density NVMe/SAS backplane environment introduces risk that this kit eliminates.

At 10.00 lb, the 4XH7A61129 ships as a substantial assembly. The X40 cable designation aligns with Lenovo's high-bandwidth internal interconnect standard, appropriate for the SR655's storage backplane architecture. Whether you are provisioning a new SR655 for a surveillance storage workload, a virtualization host, or a general-purpose enterprise compute role, having the correct mid backplane cable kit on hand before the chassis goes into the rack avoids the downtime that comes with a missing or failed internal cable discovered during commissioning.

Key Features

• SR655-Specific Fit: Engineered for the ThinkSystem SR655 chassis — avoids the connector mismatch and signal integrity issues that arise from substituting generic or cross-generation cables in a validated server platform.
• Dual Drive-Size Support: Compatible with both 2.5-inch and 3.5-inch drive bays, giving you flexibility when mixing SSD and HDD populations in the same mid backplane zone.
• 4/8-Bay Mid Backplane Coverage: Covers the mid backplane position in 4-bay and 8-bay configurations — confirm your SR655 order code and drive bay count before purchasing to ensure you select the correct backplane zone cable.
• X40 Interconnect: X40-rated internal cabling supports the high-throughput storage interconnect demands of the SR655 platform, relevant when the server is handling sustained sequential I/O typical in video storage or database workloads.
• Factory-New Assembly: Sourced factory-new through channel-direct distribution — no refurbished or grey-market components.

Integration & Compatibility

The 4XH7A61129 is a Lenovo ThinkSystem SR655 platform-specific part. Verify your SR655 configuration — chassis revision, backplane zone (mid versus rear), and drive bay count — against Lenovo's current SR655 option compatibility matrix before ordering. This cable kit is not a universal fit across the broader ThinkSystem portfolio; the SR655's backplane architecture differs from adjacent platforms such as the SR650 or SR630. For multi-server deployments or spares stocking, confirm the part number directly against your SR655 order documentation.

Frequently Asked Questions

Q: What server is the 4XH7A61129 designed for?

A: The 4XH7A61129 is designed specifically for the Lenovo ThinkSystem SR655 server, supporting the 2.5-inch and 3.5-inch 4/8-bay mid backplane with X40 cable connectivity.

Q: Does the 4XH7A61129 support both 2.5-inch and 3.5-inch drives?

A: Yes. Based on the product designation, this cable kit covers both 2.5-inch and 3.5-inch drive form factors in the SR655 mid backplane position.

Q: How much does the 4XH7A61129 weigh?

A: The 4XH7A61129 ships at 10.00 lb.

Q: Is this compatible with other ThinkSystem servers like the SR650?

A: The 4XH7A61129 is designated for the SR655 platform. Cross-platform compatibility with other ThinkSystem models such as the SR650 is not confirmed in available evidence — verify against Lenovo's SR655 option compatibility matrix before assuming interchangeability.

Q: Is this a new or refurbished part?

A: The 4XH7A61129 is sourced factory-new through channel-direct distribution. No refurbished or grey-market units.

Marty Allison

The 4XH7A61129 is the kind of part that only matters when you need it — and when you do, having the wrong one in hand during an SR655 commissioning window is a real problem. The X40 mid backplane cable designation ties directly to the SR655's internal storage interconnect architecture, and Lenovo's platform validation means this cable has been tested against the specific signal tolerances and connector engagement forces of that chassis. I flag this because server backplane cables are frequently substituted with generic alternatives in the field, and on a high-density NVMe or SAS backplane running sustained I/O, that is a reliability risk that shows up months later, not on day one.

Technical Highlights:

• Platform Specificity: Matched to the SR655 chassis — connector geometry, cable routing length, and X40 signaling are validated against this platform's backplane, not adapted from a generic assembly.
• Dual Form Factor: Covers both 2.5-inch and 3.5-inch mid backplane positions in 4-bay and 8-bay configurations, which matters when an SR655 is provisioned with a mixed SSD/HDD storage pool.
• Shipping Weight: At 10.00 lb, the 4XH7A61129 ships as a complete cable assembly — not a loose harness; factor handling weight into rack installation planning for tight-clearance deployments.

Deployment Considerations:

• Confirm your SR655's specific backplane zone (mid versus rear) and drive bay count against Lenovo's current option compatibility matrix before ordering — the SR655 has multiple backplane configurations and the wrong cable will not seat correctly.
• This part is SR655-specific; do not assume compatibility with adjacent ThinkSystem platforms. The SR650 and SR630 use different backplane architectures and cable routing.

The 4XH7A61129 is the right choice when you are maintaining or expanding an existing SR655 fleet and need a factory-matched replacement cable — particularly in surveillance storage builds or edge compute deployments where an SR655 is running 24/7 under sustained drive I/O and cable integrity directly affects uptime.