Yan Seiner wrote: > Tejun Heo wrote: >> Yan Seiner wrote: >> >>> Tejun Heo wrote: >>> >>>> 2. Specify libata.force=8.15:1.5Gbps >>>> >>> dumb question: >>> >>> Does this go on the kernel parameter line or can I change it without >>> rebooting the system? >>> >>> I don't see it in /sys/module/libata/parameters so I'm guessing it needs >>> a reboot? >>> >> >> Yeah, you will need to reboot or reload libata module. Note that if >> libata.ko is being loaded from initrd, different distros use different >> methods to pass parameters to them. >> >> > Thanks for all your help. Unfortunately I'm still dead in the water > with the jmicron controller.... :-( > > If anything, things have gotten worse. I suspect that the hardware is > broken, but I'm hoping there's still something I can do. > > The jmicron controller is ata3 and ata4. Here's my kernel line from grub: > > title Debian GNU/Linux, kernel 2.6.27.4 > root (hd0,1) > kernel /vmlinuz-2.6.27.4 root=/dev/md0 ro quiet > libata.force=3.15:1.5Gbps,4.15:1.5Gbps > initrd /initrd.img-2.6.27.4 > > I'm trying to limit the link from the controller to the PMP to 1.5 > Gbps. That doesn't seem to be happening. Worse, now the drives > connected to that controller aren't being recognized. > > I get "link online but device misclassified, retrying" errors. It's not > the drive or the caddy; I've swapped drives, slots, and cables and the > errors remain with the jmicron ports. > > I'm attaching a log which takes you from boot, to powerup of the > diskpack, and then a power cycle of the diskpack. Unfortunately I > cannot boot with the external drives powered up; the jmicron controller > hangs (it has a conflict with the scsi controller if any drives are > attached at boot.) > > I'd appreciate any help at this point. My only alternative is to > disable the onboard jmicron and get a PCI-based esata controller. The parameter isn't getting through. Please make that work first. Ask your distro how to do that and can you try a shorter cable? -- tejun -- 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
