TITLE: Windows XP Fix for Reduced Hard Disk Performance After Frequent Suspend/Resume VERSION: 1.00 Rev. A DESCRIPTION: This contains a fix for the following Windows XP problem that could occur on the desktop models listed below. After you suspend and resume your computer several times, hard disk performance may be reduced. If you use Device Manager to view the properties of the IDE channel to which the drive is connected, the Advanced Settings tab may show that the current transfer mode for the drive is "PIO Mode." After the Windows IDE/ATAPI Port driver (Atapi.sys) receives a cumulative total of six time-out or cyclical redundancy check (CRC) errors, the driver reduces the communications speed (the transfer mode) from the highest Direct Memory Access (DMA) mode to lower DMA modes in steps. If the driver continues to receive time-out or CRC errors, the driver eventually reduces the transfer mode to the slowest mode (PIO mode). For further information, refer to Microsoft Knowledge Base article 817472. PURPOSE: Recommended SOFTPAQ NUMBER: SP24491 SUPERSEDES: None EFFECTIVE DATE: July 12, 2004 CATEGORY: Operating System - Enhancements and QFEs SSM SUPPORTED: Yes PRODUCT TYPE(S): Desktops PRODUCT MODEL(S): HP Compaq Business Desktop d330 Desktop: All Models HP Compaq Business Desktop d330 Microtower: All Models HP Compaq Business Desktop d338 Microtower: All Models HP Compaq Business Desktop d330 Slim Tower: All Models HP Compaq Business Desktop d530 Convertible Minitower: All Models HP Compaq Business Desktop d538 Convertible Minitower: All Models HP Compaq Business Desktop d530 Small Form Factor: All Models HP Compaq Business Desktop d538 Small Form Factor: All Models HP Compaq Business Desktop d530 Ultra-slim Desktop: All Models HP Compaq Business Desktop dc5000 Small Form Factor: All Models HP Compaq Business Desktop dc5000 Microtower: All Models hp blade pc bc1000 HP Compaq dc7100 convertible minitower: All Models HP Compaq dc7100 small form factor: All Models HP Compaq dx6100 microtower: All Models HP Compaq dx6100 slim tower: All Models OPERATING SYSTEM(S): Windows XP Home Edition Windows XP Professional LANGUAGE(S): Global ENHANCEMENTS: N/A PREREQUISITES: N/A HOW TO USE: 1. Download the SoftPaq .EXE file to a directory on your hard drive. 2. Execute the downloaded file and follow the on-screen instructions. Copyright (c) 2004 Hewlett-Packard Development Company, L.P.