WD NAS no longer recognized by LAN computers

I plugged in my Western Digital My Book World Edition 1 terabyte ethernet NAS drive to my LAN and it was instantly recognized by my two network computers. After installing the backup software on both computers, it began backing up all of the files on both computers. Today, 2 weeks later, the WD drive disappeared from both computers. My router is working just fine, but I have been unable to open the drive which still shows up in My Computer window on VISTA but message says it cannot be accessed and Windows diagnostics cannot discover the problem. One computer is HP desktop running XP and the other is a Dell laptop running on VISTA. Any Suggestions? Did the WD drive fail? Did the operating system device drivers fail-both of them at one time? Not likely.
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  1. James in Pioneer said:
    I plugged in my Western Digital My Book World Edition 1 terabyte ethernet NAS drive to my LAN and it was instantly recognized by my two network computers. After installing the backup software on both computers, it began backing up all of the files on both computers. Today, 2 weeks later, the WD drive disappeared from both computers. My router is working just fine, but I have been unable to open the drive which still shows up in My Computer window on VISTA but message says it cannot be accessed and Windows diagnostics cannot discover the problem. One computer is HP desktop running XP and the other is a Dell laptop running on VISTA. Any Suggestions? Did the WD drive fail? Did the operating system device drivers fail-both of them at one time? Not likely.

    Answer to my own problem- WD World Book NAS drives are "always on". I rebooted the drive (honestly hadn't thought of it). It now seems to be working correctly. It seems only the little stuff gets me.
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