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

VERSION: 1.00 Rev. B
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: SP28790
SUPERSEDES: SP24491
EFFECTIVE DATE: September 20, 2004
CATEGORY: Operating System - Enhancements and QFEs
SSM SUPPORTED: Yes

PRODUCT TYPE(S):
Desktops

PRODUCT MODEL(S):
Compaq Evo D300 Convertible Minitower: All Models
Compaq Evo D300 Desktop: All Models
Compaq Evo D300 Small Form Factor: All Models
Compaq Evo D300s Convertible Minitower: All Models
Compaq Evo D300s Desktop: All Models
Compaq Evo D300s Small Form Factor: All Models
Compaq Evo D300v Microtower: All Models
Compaq Evo D310 Desktop: All Models
Compaq Evo D310 Micro-desktop: All Models
Compaq Evo D310 Microtower: All Models
Compaq Evo D310 Slim Tower: All Models
Compaq Evo D310v Microtower: All Models
Compaq Evo D311 Desktop: All Models
Compaq Evo D311 Microtower: All Models
Compaq Evo D320 Desktop: All Models
Compaq Evo D320 Microtower: All Models
Compaq Evo D320 Slim Tower: All Models
Compaq Evo D380 Microtower: All Models
Compaq Evo D380mx Desktop: All Models
Compaq Evo D381mx Desktop: All Models
Compaq Evo D500 Convertible Minitower: All Models
Compaq Evo D500 Desktop: All Models
Compaq Evo D500 Small Form Factor: All Models
Compaq Evo D510 Convertible Minitower: All Models
Compaq Evo D510 e-pc: All Models
Compaq Evo D510 Small Form Factor: All Models
Compaq Evo D510 USDT: All Models
HP bc1000: All Models
HP Compaq d220 microtower: All Models
HP Compaq d228 microtower: All Models
HP Compaq d230 microtower: All Models
HP Compaq d240 microtower: All Models
HP Compaq d248 microtower: All Models
HP Compaq d330 desktop: All Models
HP Compaq d330 microtower: All Models
HP Compaq d330 slim tower: All Models
HP Compaq d338 microtower: All Models
HP Compaq d530 convertible minitower: All Models
HP Compaq d530 small form factor: All Models
HP Compaq d530 ultra-slim desktop: All Models
HP Compaq d538 convertible minitower: All Models
HP Compaq d538 small form factor: All Models
HP Compaq dc5000 microtower: All Models
HP Compaq dc5000 small form factor: All Models
HP Compaq dc7100 convertible minitower: All Models
HP Compaq dc7100 small form factor: All Models
HP Compaq dc7100 ultra-slim desktop: All Models
HP Compaq dx2000 microtower: All Models
HP Compaq dx2000 slim tower: All Models
HP Compaq dx6100 microtower: All Models
HP Compaq dx6100 slim tower: All Models
HP d325 microtower: All Models
HP d325 slim tower: All Models
HP dx6050 microtower: All Models
HP RP5000: All Models

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

LANGUAGE(S): 
Global

ENHANCEMENTS: 
N/A

FIXES: 
- Improves error handling if an expected folder is not present on the hard 
drive.

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.