A WD My Book drive connected to a HP Computer via FireWire does not format correctly after changing the RAID mode via the WD RAID Manager utility. This affects only the following drives: My Book Pro II, WD My Book Premium II, and WD My Book Studio I and II Edition.

Answer

Problem:
A My Book Pro II, Premium II, or Studio II Edition hard drive connected to a HP Computer via FireWire may not format correctly after changing the RAID mode via the WD RAID Manager utility. This issue only occurs on HP Computers running Windows XP that incorporate the Agere L-Fw3227-100 FireWire Chipset.

Cause:
This issue is caused by the BIOS of the HP Computer that has the Agere L-Fw3227-100 FireWire Chipset. HP is currently working on this issue and may release a BIOS update in the near future to resolve this issue.

Resolution:
There is currently no resolution to this issue when the hard drive is connected via the FireWire port on the HP Computer. To work around this issue, you can change the RAID mode and format the hard drive while connected to a USB port on the HP Computer. For more information about this issue, please contact HP Support.