Segment Header Block Types

The block types that are available for the segment header types are illustrated below in decimal format. These are represented in hexadecimal format in header block dumps.

引用

Decimal    Hex  Type
1          0x01 undo segment header
11         0x0b data file header
12         0x0c data segment header with FLG blocks
14         0x0e unlimited undo segment header
15         0x0f unlimited save undo segment header
16         0x10 unlimited data segment header
17         0x11 unlimited data segment header with FLG blocks
18         0x12 extent map block
23         0x17 bitmapped segment header
29         0x1d bitmapped file space header
32         0x20 first level bitmap block
33         0x21 second level bitmap block
34         0x22 third level bitmap block
35         0x23 Pagetable segment header block
36         0x24 Pagetable extent map block
37         0x25 System Managed Undo Extent Map Block