Western Digital WD Series I USB External Drive User Manual - Manual (Page 10)

APPENDIX - 7
Appendix
Frequently Asked Questions
What is Hi-Speed USB?
Hi-Speed USB is an alternative name for USB 2.0. Low or full-speed USB 1.1 products are
simply referred as USB.
What will happen if a USB 2.0 device is plugged into a USB 1.1 port or hub?
USB 2.0 is backward compatible with USB 1.1. If connected to USB 1.1 port or hub, the
USB 2.0 device will operate at the USB 1.1full speed of up to 12 Mbps (megabits per second).
Can USB 1.1 cables be used with USB 2.0 devices?
Although USB 1.1 cables should work with USB 2.0 devices, it is recommended that USB 2.0
certified cables be used with USB 2.0 peripherals and USB 2.0 PCI adapter cards.
Troubleshooting
A summary of common questions and their answers regarding installation are listed below to
help you troubleshoot your Western Digital USB 2.0 external hard drive.
!
The drive does not power up.
Make sure that the power cable connected to the back of the external hard drive is securely
attached and that the green-colored power LED is lit.
!
The drive is not recognized under “My Computer” or the computer desktop.
If your system has a USB 2.0 PCI adapter card, make sure that its drivers have been
installed prior to connecting the Western Digital USB 2.0 external hard drive. The drive
will not be correctly recognized if the USB 2.0 root hub and host controller drivers are not
initially installed. Contact the hardware manufacturer for installation procedures.
!
I want to partition and reformat the drive.
FAT32 partitions created by the utilities included in Windows 2000/XP have a partition
size limitation of up to 32 GB. To create partitions greater than 32 GB, you will need to
reformat the drive using the NTFS file system.
Transfer Rate USB 1.1 USB 2.0
480 Mbps (High speed) — X
12 Mbps (Full speed) X X
1.5 Mbps (Low speed) X X
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