On Fri, 2012-02-10 at 00:45 -0800, Dan Williams wrote: > It is possible for a host to get "locked out" from talking to sata > devices in the domain if, for example, its sas address changes but the > expander topology has existing affiliations with the old address. If > the system is booted userspace can write to > /sys/class/sas_phy/<phy-X>/hard_reset to clear the affiliation, however > if this condition exists for the root device the module parameter can be > used to promote all ata resets to hard resets. I don't quite understand this. Are you saying we can't (or shouldn't) execute /sys/class/sas_phy/<phy-X>/hard_reset on the root device for some reason? > After the system is booted this state can be cleared via > /sys/module/libsas/parameters/force_hard_reset I really don't think a module parameter for this is such a good idea ... it effectively promotes all soft resets to being hard ones, which can have a lot of unintended consequences. James -- 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
