- Nov 20, 2006
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My "new" ASUS M2Ne mainboard was installed after a few years of storage, and all seems OK except for a sudden drop in USB 2.0 port speed. Days ago, I made a full image of my system at a normal USB 2.0 write rate of over 200 Mbps (using Macrium Reflect 5.2) and completed the image successfully in slightly over two hours.
Only days later, however, the same operation took almost six times longer (12 hours+), and consistently at a data rate of 29 Mbps, still using Macrium Reflect 5.2. This slow rate did not change when I switched to Acronis TrueImage Home 2011 for the same operation.
Nor did the data rate improve when I switched to another, identical model of external USB drive, and used another, identical and well-tested USB data cable, each component in good condition (each has made images at 200 Mbps). In fact, both USB external drives and both USB cables have been used to make an image at the faster, 200 Mbps+ rate.
No other changes on this system were made between the dates of the two backups, except for the possibility I installed (REinstalled) a driver from the mainboard drivers DVD (nVidia chipset nForce 570 Series). And because installation of the nForce Network Access Manager failed twice with errors during
the attempted installation, it seems possible some files may have been corrupted-- but I have not found any.
Although the nForce drivers DVD had a menu item to install "USB2.0 Drivers", on clicking that option, I was advised Windows XP SP1+ already has the appropriate driver, so I did not proceed.
So, all USB 2.0 drivers for storage on this system are from Microsoft, dated 7/1/2001 for the "USB Root Hub" and the "Standard OpenHCD USB Host Controller" drivers, and dated 6/1/2002 for the Standard Enhanced PCI to USB Host Controller driver. Following standard procedure with such USB problems, I have
uninstalled, then reinstalled (on boot) the current USB drivers set.
And, yes, all drivers listed under my system Device Manager / Universal Serial Bus Controllers now display "This device is working properly". The Microsoft Troubleshooting module has been of little help, in this case.
Although the 480 Mbps speed for USB2.0 is a theoretical maximum, it confirms my high expectations for USB2.0 when I attach my external USB2.0 drive to another machine with USB2.0, and it regularly turns in a writing data rate around 200 Mbps.
Operating system-- MS Windows XP Professional 32
RAM-- 2 GB
CPU-- AMD Athlon64 X2
Only days later, however, the same operation took almost six times longer (12 hours+), and consistently at a data rate of 29 Mbps, still using Macrium Reflect 5.2. This slow rate did not change when I switched to Acronis TrueImage Home 2011 for the same operation.
Nor did the data rate improve when I switched to another, identical model of external USB drive, and used another, identical and well-tested USB data cable, each component in good condition (each has made images at 200 Mbps). In fact, both USB external drives and both USB cables have been used to make an image at the faster, 200 Mbps+ rate.
No other changes on this system were made between the dates of the two backups, except for the possibility I installed (REinstalled) a driver from the mainboard drivers DVD (nVidia chipset nForce 570 Series). And because installation of the nForce Network Access Manager failed twice with errors during
the attempted installation, it seems possible some files may have been corrupted-- but I have not found any.
Although the nForce drivers DVD had a menu item to install "USB2.0 Drivers", on clicking that option, I was advised Windows XP SP1+ already has the appropriate driver, so I did not proceed.
So, all USB 2.0 drivers for storage on this system are from Microsoft, dated 7/1/2001 for the "USB Root Hub" and the "Standard OpenHCD USB Host Controller" drivers, and dated 6/1/2002 for the Standard Enhanced PCI to USB Host Controller driver. Following standard procedure with such USB problems, I have
uninstalled, then reinstalled (on boot) the current USB drivers set.
And, yes, all drivers listed under my system Device Manager / Universal Serial Bus Controllers now display "This device is working properly". The Microsoft Troubleshooting module has been of little help, in this case.
Although the 480 Mbps speed for USB2.0 is a theoretical maximum, it confirms my high expectations for USB2.0 when I attach my external USB2.0 drive to another machine with USB2.0, and it regularly turns in a writing data rate around 200 Mbps.
Operating system-- MS Windows XP Professional 32
RAM-- 2 GB
CPU-- AMD Athlon64 X2
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