In SQL Server MDF and NDF databases, all the data and the meta data(that is, the data used to manage other data) are allocated as 8KB pages, as follows:
| Page Type | Description |
| Data Page | Store record data in the database |
| Index Page | Store clustered and non-clustered indexes |
| GAM Page | Store global allocation map(GAM) info. |
| SGAM Page | Store shared global allocation map(SGAM) info. |
| IAM Page | Store index allocation map(IAM) info. |
| PFS Page | Store PFS allocation info. |