Disk Drive Access Denied under Windows 7

My Windows 7 RC 7100 has crashed while trying to enter sleep state.  After I've rebooted the sytem, about half of my hard disk partitions are inaccessible.  Whenever I try to click the drive letter, it says "Access is denined".

I've 5 hard disks in the system with 8 NTFS partitions.  The system can be mulit-booted to Windows 7, Windows Vista & XP Pro.  All booted OS has the same problem in accessing those partitions.

Here is error message when I click the drive in explorer.  The system renamed the inaccessible partitions as "Local Disk".  Does anyone know how to fix the problem?  Thanks!