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- Description
- Specifications
Lenovo option 47C9960, feature code A47J, is the Solarflare SFN6122F 2x10GbE SFP+ Onload Adapter, the low-latency (LL) member of the pair that also includes the SFN5162F. Lenovo notes that the two cards are physically identical.
Its selling point is OpenOnload, Solarflare's middleware that bypasses the Linux kernel network stack by giving each accelerated application its own virtual channel. Lenovo gives latency of 5.4 µs without OpenOnload and 2.3 µs (TCP) or 2.4 µs (UDP) with it. OpenOnload runs only on non-Xen Linux; Windows and VMware use the standard driver.
Under the hood is the Solarstorm SFC9020 controller on PCI Express 2.0 x8, with 1024 virtual channels per port, receive flow steering and NetQueue/VMQ support. Typical power is 5.9 W. Restrictions listed: no SR-IOV, no PXE or iSCSI boot, and legacy BIOS boot only.
It ships with a full-height bracket fitted, a low-profile bracket in the box and no optics. Lenovo lists it for the E5-2600 v2 M4 servers, x3650 M4 BD and HD, x3750 M4 and x3850 X6/x3950 X6; it is withdrawn from marketing.
Fit check: 47C9952 is the midrange SFN5162F on the same board, and 47C9977 is the newer SFN7122F with lower latency.
| 47C9960 Specs | |
| Option | 47C9960 |
| Feature code | A47J |
| Model | Solarflare SFN6122F LL |
| Controller | Solarstorm SFC9020 |
| Ports | 2 x SFP+ (empty cages) |
| Host interface | PCI Express 2.0 x8 |
| Latency | 5.4 µs; 2.3 µs TCP with OpenOnload |
| Power | 5.9 W typical |
| Limits | no SR-IOV, no PXE, legacy BIOS boot |