Messages in this thread | | | Subject | Re: hdparm and removable IDE? | From | Jeremy Jackson <> | Date | 31 Mar 2003 15:48:54 -0500 |
| |
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/
| |