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.