Re: IDE-flash device and hard disk on same controller

From: Padraig Brady (
Date: Tue Aug 20 2002 - 03:44:10 EST

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:

I really think some of the default CF logic is bogus.


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