lkml.org 
[lkml]   [2003]   [Mar]   [31]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: hdparm and removable IDE?
From
Date
On Mon, 2003-03-31 at 14:14, Bill Davidsen wrote:
> > IDE bus to disconnect/*reconnect*?) But hot swap will always affect both
> > cables.
>
> Boy I hope that's a typo... I hope you meant both devices on a cable and
> not really both cables on a controller.

Yep, sorry. The IDE controller must tri-state off an entire cable...
both devices. I guess you could have 2 devices, and swap one but leave
the other, you just have to halt all IO durring the swap, perhaps reset
both devices when the cable is switched back on.

Interesting to note, Intel's PIIX (forget what version) had a feature
that would split the primary cable (from the OS point of view - think
dos here) so the master was on the primary cable, and the slave was on
the secondary cable. each device (ie swap bay in a laptop) could be
tristated separately. of course you loose the secondary channel.
--
Jeremy Jackson <jerj@coplanar.net>

-
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/

\
 
 \ /
  Last update: 2005-03-22 13:34    [W:0.055 / U:0.320 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site