Messages in this thread |  | | From | "Heater, Daniel (IndSys, GEFanuc, VMIC)" <> | Subject | RE: IDE-flash device and hard disk on same controller | Date | Tue, 20 Aug 2002 15:52:05 -0400 |
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> Heater, Daniel (IndSys, GEFanuc, VMIC) wrote: > > The IDE driver, file ide-probe.c currently contains this > test do prevent > > hard drives and IDE-flash devices (ex CompactFlash) from > co-existing on the > > same IDE controller. > > > > /* > > * Prevent long system lockup probing later for non-existant > > * slave drive if the hwif is actually a flash > memory card of some > > variety: > > */ > > if (drive_is_flashcard(drive)) { > > ide_drive_t *mate = > > &HWIF(drive)->drives[1^drive->select.b.unit]; > > if (!mate->ata_flash) { > > mate->present = 0; > > mate->noprobe = 1; > > } > > } > > > > This test's assumption that a spinning hard drive cannot > coexist on the same > > controller as an IDE-flash device is incorrect. I have a > working setup with > > such a configuration. I don't think that the IDE subsystem > should punish > > everyone because _some_ hardware cannot tolerate this configuration. > > > > One solution may be to remove this test from the IDE > subsystem and force > > users with buggy hardware to explicitly disable probing > for a second > > device. I think the parameters hdx=none or hdx=noprobe > should work for > > them. > > > > Comments?? > > Mentioned several times (and there is a workaround), see: > http://marc.theaimsgroup.com/?l=linux-kernel&m=100446144028502&w=2 > > I really think some of the default CF logic is bogus. > > Pádraig. >
OK. hdc=flash works where hdc=hard drive and hdd=CompactFlash.
Thanks Padraig.
I guess it's 6 of one, half-dozen the other, but telling the kernel that my hard drive is a flash drive just makes me feel squidgy! I'm still inclined to suggest that the test that _prevents_ hard drive + CF configuration is no longer appropriate now that _some_ (most??) hardware vendors have figured out how to get ide-flash devices to work without "hanging" when no second device is present. Users with incompatible hardware can still prevent the long system hang by using hdx=none.
I also used this workaround (hdb=flash) to configure a system with hda=flash and hdb=cdrom. This seems to work also. Are there any side effects to telling the kernel that the hard drive or cdrom is a flash device (such as marking it removable or not marking it removable)? - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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