I am using SQL Server 2008 R2 Standard (version 10.50.1600.1) for my production website and SQL Server Express edition with Advanced Services (v10.50.1600.1) for my localhost as a database.
Few days back my SQL Server crashed and I had to install a new 2008 R2 Express version on my localhost. It worked fine when I restored some older versions taken from Express edition but when I try to restore database from .bak file which is taken from production server it is causing the following error:
Error: Specified cast is not valid. (SqlManagerUI)
and when I try to restore the database using command
Use Master
Go
RESTORE DATABASE Publications
FROM DISK = 'C:\Publications.bak'
WITH MOVE 'Publications' TO 'C:\Program Files\Microsoft SQL Server\MSSQL10_50.SQLEXPRESS2008R2\MSSQL\DATA\Publications.mdf',--adjust path
MOVE 'AlPublications_log' TO 'C:\Program Files\Microsoft SQL Server\MSSQL10_50.SQLEXPRESS2008R2\MSSQL\DATA\Publications.ldf'
It generates a different error
Msg 3154, Level 16, State 4, Line 1
The backup set holds a backup of a database other than the existing 'Publications' database.
Msg 3013, Level 16, State 1, Line 1
RESTORE DATABASE is terminating abnormally.
I have cross checked the versions. They all seem matching to me as shown in the image below
Previously I was able to restore a database from standard version to express edition but now it fails. I deleted the database and tried to recreate it. That fails, too.
I am not sure what I am doing wrong. I would appreciate help in this regarding
Issue was resolved as it seems .bak file was corrupt. When I tried it with a different file it worked.
The GUI can be fickle at times. The error you got when using T-SQL is because you're trying to overwrite an existing database, but did not specify to overwrite/replace the existing database. The following might work:
Use Master
Go
RESTORE DATABASE Publications
FROM DISK = 'C:\Publications_backup_2012_10_15_010004_5648316.bak'
WITH
MOVE 'Publications' TO 'C:\Program Files\Microsoft SQL Server\MSSQL10_50.SQLEXPRESS2008R2\MSSQL\DATA\Publications.mdf',--adjust path
MOVE 'Publications_log' TO 'C:\Program Files\Microsoft SQL Server\MSSQL10_50.SQLEXPRESS2008R2\MSSQL\DATA\Publications.ldf'
, REPLACE -- Add REPLACE to specify the existing database which should be overwritten.
Could be because of restoring SQL Server 2012 version backup file into SQL Server 2008 R2 or even less.
Finally got this error to go away on a restore. I moved to SQL2012 out of frustration, but I guess this would probably still work on 2008R2. I had to use the logical names:
RESTORE FILELISTONLY
FROM DISK = ‘location of your.bak file’
And from there I ran a restore statement with MOVE using logical names.
RESTORE DATABASE database1
FROM DISK = '\\database path\database.bak'
WITH
MOVE 'File_Data' TO 'E:\location\database.mdf',
MOVE 'File_DOCS' TO 'E:\location\database_1.ndf',
MOVE 'file' TO 'E:\location\database_2.ndf',
MOVE 'file' TO 'E:\location\database_3.ndf',
MOVE 'file_Log' TO 'E:\location\database.ldf'
When it was done restoring, I almost wept with joy.
Good luck!
Below can be 2 reasons for this issue:
Backup taken on SQL 2012 and Restore Headeronly was done in SQL 2008 R2
Backup media is corrupted.
If we run below command, we can find actual error always:
restore headeronly
from disk = 'C:\Users\Public\Database.bak'
Give complete location of your database file in the quot
Hope it helps
来源：https://stackoverflow.com/questions/13604720/sql-server-database-restore-error-specified-cast-is-not-valid-sqlmanagerui