Offline Index Rebuild on a Partitioned Table

CREATE PARTITION FUNCTION YourMom ( INT )
    AS RANGE LEFT FOR VALUES ( 1000000, 2000000, 3000000, 4000000, 5000000 );

CREATE PARTITION SCHEME YourDad
    AS PARTITION YourMom
    ALL TO ( [PRIMARY] );

CREATE TABLE dbo.YourAuntDebbie
(
    Id INT,
    StopUsingDeprecatedDataTypes NTEXT
) ON YourDad (Id);


DECLARE @counter INT = 1;
WHILE @counter < 6
    BEGIN

        RAISERROR('Run number: %d', 0, 1, @counter) WITH NOWAIT;

        INSERT dbo.YourAuntDebbie WITH ( TABLOCK ) ( Id, StopUsingDeprecatedDataTypes )
        SELECT TOP 1000000 x.n + CASE WHEN @counter = 1 THEN 0
                                      WHEN @counter = 2 THEN 1000000 
                                      WHEN @counter = 3 THEN 2000000 
                                      WHEN @counter = 4 THEN 3000000 
                                      WHEN @counter = 5 THEN 4000000 
                                      ELSE 0 
                                      END, 
                           REPLICATE(N'A', x.n % 10000)
        FROM   (   SELECT ROW_NUMBER() OVER ( ORDER BY @@ROWCOUNT ) AS n
                   FROM   sys.messages AS m
                   CROSS JOIN sys.messages AS m2 ) AS x;

        SET @counter += 1;

    END;

CREATE CLUSTERED INDEX ix_whatever
    ON dbo.YourAuntDebbie ( Id ) ON YourDad(Id);

SELECT OBJECT_NAME(p.object_id) AS table_name, p.partition_number, p.rows
FROM   sys.partitions AS p
WHERE  p.object_id = OBJECT_ID('dbo.YourAuntDebbie');

+----------------+------------------+---------+
|   table_name   | partition_number |  rows   |
+----------------+------------------+---------+
| YourAuntDebbie |                1 | 1000000 |
| YourAuntDebbie |                2 | 1000000 |
| YourAuntDebbie |                3 | 1000000 |
| YourAuntDebbie |                4 | 1000000 |
| YourAuntDebbie |                5 | 1000000 |
| YourAuntDebbie |                6 |       0 |
+----------------+------------------+---------+

CREATE EVENT SESSION Locks
    ON SERVER
    ADD EVENT sqlserver.lock_acquired
    ( SET collect_resource_description = ( 1 )
     ACTION ( sqlserver.sql_text )
     WHERE (   sqlserver.equal_i_sql_unicode_string(sqlserver.database_name, N'Crap')
               AND package0.equal_uint64(sqlserver.session_id, ( 61 )))),
    ADD EVENT sqlserver.lock_released
    ( SET collect_resource_description = ( 1 )
     ACTION ( sqlserver.sql_text )
     WHERE (   sqlserver.database_name = N'Crap'
               AND sqlserver.session_id = ( 61 )))
    ADD TARGET package0.event_file
    ( SET filename = N'c:\temp\Locks' )
    WITH ( MAX_MEMORY = 4096KB,
           EVENT_RETENTION_MODE = ALLOW_SINGLE_EVENT_LOSS,
           MAX_DISPATCH_LATENCY = 30 SECONDS,
           MAX_EVENT_SIZE = 0KB,
           MEMORY_PARTITION_MODE = NONE,
           TRACK_CAUSALITY = ON,
           STARTUP_STATE = OFF );
GO

ALTER EVENT SESSION Locks ON SERVER STATE = START;

ALTER INDEX ix_whatever ON dbo.YourAuntDebbie REBUILD PARTITION = 1 WITH (ONLINE = OFF);
GO 

ALTER INDEX ix_whatever ON dbo.YourAuntDebbie REBUILD PARTITION = 2 WITH (ONLINE = OFF);
GO 

ALTER INDEX ix_whatever ON dbo.YourAuntDebbie REBUILD PARTITION = 3 WITH (ONLINE = OFF);
GO 

ALTER INDEX ix_whatever ON dbo.YourAuntDebbie REBUILD PARTITION = 4 WITH (ONLINE = OFF);
GO 

ALTER INDEX ix_whatever ON dbo.YourAuntDebbie REBUILD PARTITION = 5 WITH (ONLINE = OFF); 
GO 

ALTER INDEX ix_whatever ON dbo.YourAuntDebbie REBUILD PARTITION = 6 WITH (ONLINE = OFF);
GO 

ALTER EVENT SESSION Locks ON SERVER STATE = STOP;