Unable to install maibox role 2010 Exchange with coexistence fo 2003

Installation of Mailbox role failed during setup. When rebooted server cannot uninstalled service as it seems not successfully installed.
There are some dismount databases that's seems to be created during this process and causing the problem, App log login event id: 104.
When try to re-run setup with role check getting following error:


Summary: 3 item(s). 1 succeeded, 1 failed.
Elapsed time: 00:00:04


Preparing Setup
Completed

Elapsed Time: 00:00:01


Mailbox Role
Failed

Error:
The following error was generated when "$error.Clear();
          $name = [Microsoft.Exchange.Management.RecipientTasks.EnableMailbox]::DiscoveryMailboxUniqueName;
          $dispname = [Microsoft.Exchange.Management.RecipientTasks.EnableMailbox]::DiscoveryMailboxDisplayName;
          $dismbx = get-mailbox -Filter {name -eq $name} -IgnoreDefaultScope -resultSize 1;
          if( $dismbx -ne $null)
          {
            $srvname = $dismbx.ServerName;
            if( $dismbx.Database -ne $null -and $RoleFqdnOrName -like "$srvname.*" )
            {
              Write-ExchangeSetupLog -info "Setup DiscoverySearchMailbox Permission.";
              $mountedMdb = get-mailboxdatabase $dismbx.Database -status | where { $_.Mounted -eq $true };
              if( $mountedMdb -eq $null )
              {
                Write-ExchangeSetupLog -info "Mounting database before stamp DiscoverySearchMailbox Permission...";
                mount-database $dismbx.Database;
              }

              $mountedMdb = get-mailboxdatabase $dismbx.Database -status | where { $_.Mounted -eq $true };
              if( $mountedMdb -ne $null )
              {
                $dmRoleGroupGuid = [Microsoft.Exchange.Data.Directory.Management.RoleGroup]::DiscoveryManagementWkGuid;
                $dmRoleGroup = Get-RoleGroup -Identity $dmRoleGroupGuid -DomainController $RoleDomainController -ErrorAction:SilentlyContinue;
                if( $dmRoleGroup -ne $null )
                {
                  Add-MailboxPermission $dismbx -User $dmRoleGroup.Identity -AccessRights FullAccess -DomainController $RoleDomainController -WarningAction SilentlyContinue;
                }
              }
            }
          }
        " was run: "Couldn't mount the database that you specified. Specified database: Mailbox Database 1315546459; Error code: An Active Manager operation failed with a transient error. Please retry the operation. Error: Database action failed with transient error. Error: A transient error occurred during a database operation. Error: An error occurred while preparing to mount database 'Mailbox Database 1315546459'. Error: Could not find a part of the path 'C:\Program Files\Microsoft\Exchange Server\V14\Mailbox\Mailbox Database 1315546459'. [Database: Mailbox Database 1315546459, Server: MARS.solve.solveltd.com].".

Couldn't mount the database that you specified. Specified database: Mailbox Database 1315546459; Error code: An Active Manager operation failed with a transient error. Please retry the operation. Error: Database action failed with transient error. Error: A transient error occurred during a database operation. Error: An error occurred while preparing to mount database 'Mailbox Database 1315546459'. Error: Could not find a part of the path 'C:\Program Files\Microsoft\Exchange Server\V14\Mailbox\Mailbox Database 1315546459'. [Database: Mailbox Database 1315546459, Server: MARS.solve.solveltd.com].

An Active Manager operation failed with a transient error. Please retry the operation. Error: Database action failed with transient error. Error: A transient error occurred during a database operation. Error: An error occurred while preparing to mount database 'Mailbox Database 1315546459'. Error: Could not find a part of the path 'C:\Program Files\Microsoft\Exchange Server\V14\Mailbox\Mailbox Database 1315546459'. [Database: Mailbox Database 1315546459, Server: MARS.solve.solveltd.com]

An Active Manager operation failed with a transient error. Please retry the operation. Error: An error occurred while preparing to mount database 'Mailbox Database 1315546459'. Error: Could not find a part of the path 'C:\Program Files\Microsoft\Exchange Server\V14\Mailbox\Mailbox Database 1315546459'. [Server: Mars.solve.solveltd.com]

An error occurred while preparing to mount database 'Mailbox Database 1315546459'. Error: Could not find a part of the path 'C:\Program Files\Microsoft\Exchange Server\V14\Mailbox\Mailbox Database 1315546459'.

Could not find a part of the path 'C:\Program Files\Microsoft\Exchange Server\V14\Mailbox\Mailbox Database 1315546459'.
Click here for help... http://technet.microsoft.com/en-US/library/ms.exch.err.default(EXCHG.141).aspx?v=14.1.438.0&e=ms.exch.err.Ex88D115&l=0&cl=cp

Elapsed Time: 00:00:03


Finalizing Setup
Cancelled