D:/ Drive on server says "Access Denied" permissions are completely messed up

Hi,
On our Windows SBS 2008, Exchange stopped working today at about 12pm. In the Exchange console it says "Disconnected Mailbox" and there is an error message that  says:
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Microsoft Exchange Warning
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Warnings

Get-MailboxStatistics
Completed

Warning:
The database 'SERVER\First Storage Group\Mailbox Database' to be accessed on server 'server.domain.local' is not mounted or is not available.

HOWEVER - the exchange database is on the D:\ drive and when I tried to open it is says Access Denied and would not show any info until I took ownership as an admin. At this point I believe the Exchange problem is due to this as well as Remote Web Workplace not working.

What is the best method to restore/fix permissions on on this whole drive? If I restore from VSS are permissions restored also? We do also have an offsite backup through MozyPro but the time to restore from there is very long.

Of course Exchange and Remote Web Workplace are the priorities.
jmolhavaAsked:
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Brett DanneyConnect With a Mentor IT ArchitectCommented:
This articale explains how you would reset the disk back to the default permissions http://support.microsoft.com/kb/313222
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jmolhavaAuthor Commented:
thank you
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