IDE chipsets and hdd hotswap

[Richard Smith]

Jeremy Jackson wrote:

> 
> The second issue is the ability to tri-state off the bus, but I can find 
> that info elsewhere (ie kernel source)  The hdparm utility/kernel driver 
> has the beginnings of this support.

I know its an old chipset but the 440bx has a bit that you set to 
disable the ide[01] device and tristate all its lines.  I suspect that 
most of the other chipsets have the same type setup.  That functionality 
and a gp input pin with a really weak pullup attached to a ground pin on 
the IDE cable should give you hotplug functionality.


-- 
Richard A. Smith
rsmith at bitworks.com