Some of you may be interested in this PCIe card: http://www.addonics.com/products/ad4mspx2.php I just received a couple of them and have done basic functionality testing. No bcache yet but that is what they are intended for. The controller is a Marvell 88SE9230 connected via an x2 link. 03:00.0 SATA controller: Marvell Technology Group Ltd. 88SE9230 PCIe SATA 6Gb/s Controller (rev 10) LnkCap: Port #0, Speed 5GT/s, Width x2, ASPM L0s L1, Latency L0 <512ns, L1 <64us ClockPM- Surprise- LLActRep- BwNot- LnkCtl: ASPM Disabled; RCB 64 bytes Disabled- Retrain- CommClk+ ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt- LnkSta: Speed 5GT/s, Width x2, TrErr- Train- SlotClk+ DLActive- BWMgmt- ABWMgmt-- Kernel driver in use: ahci Kernel modules: ahci [8:0:0:0] disk ATA MKNSSDAT120GB-DX 521A /dev/sde [9:0:0:0] disk ATA MKNSSDAT120GB-DX 507A /dev/sdf So you are theoretically limited to less than 1GB/s across PCIe but for caching purposes I'm more interested in IOPS than raw bandwidth anyways. Using "dd if=/dev/zero of=/dev/sdX bs=1M oflag=direct" I am seeing ~380MB/s per device on 2 Mushkin MKNSSDAT120GB-DX concurrently. Not the greatest test but it does show that they work OK. I am getting Fedora 20 installed the way I want it and then the real testing will begin. -- To unsubscribe from this list: send the line "unsubscribe linux-bcache" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
