NeilBrown wrote: > On Fri, July 17, 2009 2:12 pm, Tejun Heo wrote: >> Tomasz Chmielewski wrote: >>> And one of the disks is kicked out of RAID. >>> >>> Is it expected behaviour (although probably the error happens somewhere >>> in the ata layer)? >> Yes, it's expected. Wakeup requires reset via EH and md requests have >> FAILFAST flag set, so they never get retried. The behavior can be >> changed tho. Hmmm... not entirely sure what to do at this point. > > Nope, 'md' requests do not get FAILFAST set. Oh... then it's unexpected. I'll see if I can reproduce the failure here. > I tried that and easily found cases where it fails way too fast. > FAILFAST seems to mean different things on different devices, making > it useless in general (it is still useful in some specific cases > such as multipath on devices which are expected to be used under > multipath and so treat FAILFAST appropriately). Yeap, FAILFAST flags seem geared pretty much toward multipathing. Thanks. -- 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
