Error logg looks like this
[08:00:08.771] WARNING: SQLServer DBCC CHECKDB failed.
[08:00:08.780] SQLServer DBCC CHECKDB Failed, Error Code: 0x800409cc
[08:00:08.781] Migration is terminated as DBCC failed before migration.
[08:00:08.781] SQLServer DBCC CHECKDB Failed, Error Code: 0x800409cc
[08:00:08.782] Failed to migrate SQL Server user databases.
[08:00:08.783] Error occurred during user database migration.
[08:00:08.783] ***ADD MSISCSI SERVICE AS A DEPENDENCY OF [MSSQLSERVER]
[08:00:08.783]
[08:00:08.784] Adding service [MSiSCSI] as a dependency of [MSSQLSERVER]...
[08:00:08.785] Server [MSiSCSI] was on the dependency list of the specified service.
[08:00:08.785] Configuring the SQLServer Maximum Worker Threads Option...
[08:00:08.785]
[08:00:08.785] *** SNAPMANAGER CONFIGURATION JOB ENDED AT: [12-05-2011 08.00.08]
[08:00:08.785] SQLServer DBCC CHECKDB Failed, Error Code: 0x800409cc