2003-07-17 15:35:06

by John Bradford

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Subject: Re: Fix IDE initialization when we don't probe for interrupts.

> Another trick is the `IDE doubler' for Amiga (but I guess you can make it work
> on any IDE interface): with a few diodes you can map the second bank of 8 IDE
> registers to a second IDE chain, doubling the number of devices you can
> attach.

Does Linux actually support that, (on any architecture)?

I was just imagining a RAID array on laptops which only have one IDE controller...

John.


2003-07-17 15:38:41

by Geert Uytterhoeven

[permalink] [raw]
Subject: Re: Fix IDE initialization when we don't probe for interrupts.

On Thu, 17 Jul 2003, John Bradford wrote:
> > Another trick is the `IDE doubler' for Amiga (but I guess you can make it work
> > on any IDE interface): with a few diodes you can map the second bank of 8 IDE
> > registers to a second IDE chain, doubling the number of devices you can
> > attach.
>
> Does Linux actually support that, (on any architecture)?

Yes, that's why there are tests for CONTROL_REG in the code in the first place.
Check out CONFIG_BLK_DEV_IDEDOUBLER in drivers/ide/.

> I was just imagining a RAID array on laptops which only have one IDE controller...

Cool ;-)

Gr{oetje,eeting}s,

Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- [email protected]

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds