Re: problems with NATA + EHCI + USB harddisk

[Sascha Wildner <saw@xxxxxxxxx>]

Matthew Dillon wrote:
> :Hi,
> :
> :I got curious about Alexander Shiryaev's USB harddisk bug and just 
> :upgraded my system on a USB harddisk to HEAD. It shows some different 
> :behavior here:
> :
> :All works unless I use _both_ EHCI and NATA. Either one will work fine 
> :alone but used together will result in da0 (the USB harddisk) not being 
> :detected upon boot, ending on the mountroot> prompt.
> :
> :Sascha
> :
> :-- 
> :http://yoyodyne.ath.cx
>
>     I've seen this too.  If I load EHCI as a module da0 doesn't get detected
>     at boot time.
>
>     There's some sort of timing issue.  I'm certain it's not NATA's fault
>     but instead it is an issue with assumptions the USB code makes when
>     EHCI is present.  EHCI has to take over the OHCI driver and its a real
>     mess (and badly designed).

Hmm, strange that old ATA and EHCI work fine, though.

Sascha

--
http://yoyodyne.ath.cx