Failed to mount database "Exchange Database"

Hello,
I have Windows SBS 2008 with two partitions:
C: Drive which is raid 1 (mirror)
D: Drive which is Raid 5

Now the thing is I found that one of the HDDs of the D drive (Raid 5) was rebuilding I don't know why. And my Exchange DB is stored in D drive.

I have taken an image from this whole volume and restored it in another HDD (Sata)

when I restarted the server everything was OK except exchange DB is not mounted and when I try to mount I get the following message:


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Microsoft Exchange Error
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Failed to mount database 'Mailbox Database'.

Mailbox Database
Failed
Error:
Exchange is unable to mount the database that you specified. Specified database: SERVER\First Storage Group\Mailbox Database; Error code: MapiExceptionCallFailed: Unable to mount database. (hr=0x80004005, ec=-546)
.




--------------------------------------------------------
OK
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Please help and thank you in advance,