Server Resellers
Huawei 03058889 Controller Module (STL2CONTB20) for OceanStor 5110 / 5210 / 5110F V5
The 03058889 Controller is a replacement control module for Huawei OceanStor 5110, 5210, and 5110F V5 storage systems, supplied under model code STL2CONTB20. It is the module that runs the array’s control plane, serves host connectivity, and executes data services such as snapshots and replication. When one of the two controllers fails, this is the part that restores the pair.
Key Specifications
| Item | Detail |
| Huawei Part Number | 03058889 |
| Model Code | STL2CONTB20 |
| Device Type | Storage controller module (control plane) |
| Compatibility | OceanStor 5110 V5 / 5210 V5 / 5110F V5 |
| Position | Controller slot, controller enclosure |
| Redundancy | Active-active dual-controller configuration |
| Condition | Tested replacement module |
What the Controller Actually Does
Every operation on the array passes through this module: host I/O, caching, RAID management, deduplication and compression where enabled, and all data services reported to the management plane. A degraded controller is not a cosmetic fault — the surviving unit absorbs the full workload, and the array loses the redundancy that keeps it serving I/O through maintenance and faults.
Dual-Controller Redundancy: Why Timing Matters
OceanStor V5 systems run two controllers in an active-active pair, sharing cache state and splitting the workload. Lose one, and the array keeps serving I/O — but with no redundancy, higher thermal load, and no margin for a second event. Replacing the failed controller promptly is the entire point of the design: the cheap spare you keep on the shelf is what turns an outage risk into a routine maintenance task.
Firmware, Pairing and Model Checks
Controller replacement is a paired-component job, not a disk swap. Before ordering or installing, confirm four things:
- The model code on your existing module matches STL2CONTB20.
- The replacement is correct for your exact model — 5110 V5, 5210 V5, and 5110F V5 are different systems, and controller compatibility follows the system, not the series name.
- The firmware level is compatible with the surviving controller, so the pair can form and cache mirroring can resume.
- Your service procedure has been reviewed for your specific V5 release.
If you are unsure, send us a photo of the module label and your current firmware version — we will confirm fitment before you commit.
Replacing in a Redundant Configuration
In a healthy dual-controller system, the module is replaced one at a time following Huawei’s documented service procedure, while the surviving controller continues to serve hosts. Never remove both modules, and verify cache mirroring and system status have recovered before closing the maintenance.
Ideal Applications
- Replacing a failed controller in 5110 / 5210 / 5110F V5 systems
- Restoring active-active redundancy after a controller fault
- On-site spare stock for business-critical storage
- Refresh and consolidation projects on V5 platforms
Testing, Warranty and Support
Every module is tested before shipment and matched to OceanStor V5 systems. Units ship with our warranty and technical support, and volume pricing is available for spare-parts programs.
Need help confirming compatibility? Read about active-active high availability, or shop more OceanStor V5 controllers and spare parts from our catalog.
