Western Digital My Book for Mac User Manual - Manual (Page 63)

MY BOOK FOR MAC
USER MANUAL
TROUBLESHOOTING – 58
Q: Why is the data transfer rate slow?
A: Your system may be operating at USB 1.1 speeds due to an incorrect driver
installation of the USB 2.0 adapter card or a system that does not support USB 2.0.
If your system includes a PCI slot, you can achieve Hi-Speed USB transfer rates by
installing a USB 2.0 PCI adapter card. Contact the card manufacturer for installation
procedures and more information.
Note: If an additional external drive is connected to the WD product, USB
bandwidth is shared and may affect performance.
Q: Why does the drive not power up?
A: Be sure the drive is plugged in to a power source. A special cable may be needed for
computers with limited bus power. For more information in the U.S., visit our Web
site at
store.westerndigital.com . Outside the U.S., contact WD Technical Support in
your region.
Q: Why is the drive not recognized under My Computer or on the computer desktop?
A: If your system has a USB 2.0 PCI adapter card, be sure that its drivers are installed
before connecting your WD USB 2.0 external storage product. The drive is not
recognized correctly unless USB 2.0 root hub and host controller drivers are
installed. Contact the adapter card manufacturer for installation procedures.
Q: Why won't my computer boot when I connect my USB drive to the computer before
booting?
A: Depending on your system configuration, your computer may attempt to boot from
your WD portable USB drive. Refer to your system’s motherboard BIOS setting
documentation to disable this feature or visit
http://support.wdc.com and see
Knowledge Base answer ID 1201. For more information about booting from external
drives, refer to your system documentation or contact your system manufacturer.