Alan Cox wrote: > So I've been doing a scan of the code versus the early ATA specifications > (English translation not the original Latin ;)) > > I've found a couple of problem cases we don't deal with but I'm not sure > matter, and an inconsistency > > #1 We assume identify works. Early ATA actually lists this command > as optional > #2 We don't allow for INIT_DEV_PARAMS failing which it may do on > some early IDE pre ATA devices > > and the inconsistency > > We check ATA < 4 || non-LBA capable when deciding whether to issue > INIT_DEV_PARAMS. ATA 4+ however mandate LBA so the second case isn't > theoretically at least possible. > > Aside from those cases the command issue (but not the detection paths) > appear to be clean for everything from ST412 upwards providing a drive is > being used in 16 head mode and does its own write precompensation > selection. > > So in theory we can persuade libata to drive original MFM/RLL disks with > relatively few changes Does anyone have a working device to test? -- 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
