I wrote: > I have a SiI3124 PCI-X controller .. > I have been using this configuration with a DS-1220 external > enclosure + port multiplier: .. > Occasionally, I get an error like this: > > Mar 9 12:53:18 localhost kernel: ata8.00: exception Emask 0x0 SAct 0x1 SErr 0x0 action 0x2 frozen > Mar 9 12:53:18 localhost kernel: ata8.00: tag 0 cmd 0x61 Emask 0x4 stat 0x40 err 0x0 (timeout) > Mar 9 12:53:18 localhost kernel: ata8.15: hard resetting port After moving the port multiplier from the PCI-X SiI3124 to a PCIe SiI3132, the timeouts are gone. No errors at all while moving 1T back and forth and resyncing the RAID. I wonder if it's a bad card (Norco 4618, came with the enclosure) or a driver issue. Robin H. Johnson wrote: > Also, afaik there has been no resolution of the performance issue - while the > controller shows 3Gb, the actual combined speeds I get are only at the 1.5Gb > level. I agree, on a single port combined speeds are right around 150MB/sec. On two ports it hits 180MB/sec. I guess that's approaching the PCIe x1 limit. One interesting note is that the original SiI3124 controller always reported the host->PMP link as 1.5Gb. The SiI3132 reports it as 3.0Gb. -jim - To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
