TITLE: Windows XP Fix for Reduced Hard Disk Performance After Frequent 
Suspend/Resume

VERSION: 1.00 Rev. A
DESCRIPTION:
This package contains a fix for the following Windows XP issue that could occur 
on the listed desktop models.

After a desktop cycles through Suspend and Resume modes several times, hard 
disk performance may be reduced. If Device Manager is used 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, "IDE 
ATA and ATAPI Disks Use P10 Mode After Multiple Time-Out or CRC Error Occur." 

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

HARDWARE PRODUCT MODEL(S):
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

SOFTWARE PRODUCT(S):
None

OPERATING SYSTEM(S): 
Microsoft Windows XP Home Edition
Microsoft Windows XP Professional

LANGUAGE(S): 
Global

ENHANCEMENTS: 
N/A

PREREQUISITES: 
N/A

INSTALLATION INSTRUCTIONS: 
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.