On a Lenovo Thinkpad that runs Windows Vista, you find that the disk space is used up after a period of time.

The information in this article applies to the following configuration(s):

• Radeonâ„¢ HD 2600 series
• Radeonâ„¢ HD 2400 series
• Windows Vista 32-bit Edition
• Windows Vista 64-bit Edition

Symptoms:
Connecting a Lenovo 19″ Wide Slim LCD display device to either an ATI Radeonâ„¢ HD 2600 or ATI Radeonâ„¢ HD 2400 and setting the display resolution to 1440×900 @ 60Hz. results in an image failing to be displayed

In Windows Vista, an Ultra DMA Mode 5 device may perform only at the speed of an Ultra DMA Mode 2 device after you swap devices.

This problem occurs on an IBM ThinkPad mobile PC or on a Lenovo ThinkPad mobile PC if the following conditions are true:

• You start the computer with an Ultra DMA Mode 2 device in the Ultrabay swappable drive bay. For example, you start the computer with an optical drive in the drive bay.
• You eject the Ultra DMA Mode 2 device from the drive bay and insert an Ultra DMA Mode 5 device in the drive bay. For example, you insert a hard disk drive in the drive bay.

When these conditions are true, the transfer mode stays at the slower Ultra DMA Mode 2 speed. The system does not correctly use the faster Ultra DMA Mode 5 speed.