10777: dimension and fact table with PRIMARY KEY NONCLUSTERED, why?

Hi experts:

in a datawarehouse database that the primary keys of the dimension tables must be NONCLOUSTERED

CREATE TABLE DimProduct
(ProductKey int identity NOT NULL PRIMARY KEY NONCLUSTERED,
 ProductAltKey nvarchar(10) NOT NULL)
GO

 CREATE TABLE DimCustomer
(CustomerKey int identity NOT NULL PRIMARY KEY NONCLUSTERED,
 CustomerAltKey nvarchar(10) NOT NULL,
 CustomerGeographyKey int NULL REFERENCES DimGeography(GeographyKey))
GO

Incluso las fact table
-- CREATE A FACT TABLE
  CREATE TABLE FactSalesOrders
  (ProductKey int NOT NULL REFERENCES DimProduct(ProductKey),
   CustomerKey int NOT NULL REFERENCES DimCustomer(CustomerKey),
   SalespersonKey int NOT NULL REFERENCES DimSalesperson(SalespersonKey),
   OrderDateKey int NOT NULL REFERENCES DimDate(DateKey),
   OrderNo int NOT NULL,
   ItemNo int NOT NULL,
   Quantity int NOT NULL,
   SalesAmount money NOT NULL,
   Cost money NOT NULL
    CONSTRAINT [PK_ FactSalesOrder] PRIMARY KEY NONCLUSTERED
 (
      [ProductKey],[CustomerKey],[SalesPersonKey],[OrderDateKey],[OrderNo],[ItemNo]
 )
scriptDATABASEwarehouse
enrique_aeoAsked:
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Scott PletcherSenior DBACommented:
That makes sense *only* if they have a different set of column(s) identified as the clustering key(s), for example:

CREATE CLUSTERED INDEX ... ON DimProduct ( ... )
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enrique_aeoAuthor Commented:
in the attached script scriptDATABASEwarehouse shows that there is clustered promary key, why?
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enrique_aeoAuthor Commented:
If I have to partition tables and place them in RAID10, it could do if the index is clusterded?
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