Okay, I have a computing issue that would be nice to be resolved.
My PC came with 8 USB 2.0 ports. Mouse and keyboard are on two of them.
I bought two My Book 4 TB external harddrives.
If I connect both at the same time, one will not read. My Computer (Win7) will not pick it up until I unplug the other and reboot the My Book power.
I also have a BlacX dual hard drive dock with a 2 TB and 1 TB drive in each slot. The BlacX will boot up with one My Book okay but the 2nd My Book will not read if all are connected at the same time.
I've reformated both My Books and set partitions on each. Both work but not at the same time. I want to transfer files between the two but I am forced to use a 3rd drive as a go between.
My machine is a HP h8-1214 Pavillion HPE
AMD FX-6100 6 core processor 3.30 GHz
10.0 GB memory
64 bit
Mainboard is a 2AC8 Gigabyte
BIOS is AMI Ang_713 12/29/2011
Graphics is a AMD Radeon HD 7450
Storage Controller is AMD AHCI Compatible Raid Controller
There are no problems in my Universal Serial Bus Controller list on my Device Manager.
As Far as I know, There are no services suspended or disabled that affect the ability to read devices.
Could there be a conflict in the MFT of the two similar drives that prevent aquisition? I'm thinking that the MFT may be the same so it only picks up one or the other?
Try this:
http://support.wdc.com/knowledgebase/answer.aspx?ID=6571