Bug#265093: IDE-"crash" due to DSC timeout during package installation.

[Thomas Hofer <th@monochrom.at>]

I moved the DVD-ROM to the other IDE-channel - it seems that this makes 
the problem disappear without the need to disable dsc_overlap. I'm not 
100% sure about these workarounds, because the problem occurs only 90% 
of the time and I tried only one additional installation.

The new configuration was:

Mainboard: Tyan S1590S Trinity 100AT 
Chipset: VIA MVP3 (82C5xx)   
CPU: AMD K6-II / 500 MHz
IDE HD (WDC WD450AA-00BAA0) on hda (installation target)
IDE DVD-ROM (Asus E616) on hdc (installtion source)