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What Is The Logical Structure Of The Disk Resources?

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Following is the logical structure of the disk resources:

  •  DATA block :Refers to the SMALLEST logical storage unit. Size of a data block is a MULTIPLE of operating system block size.
  •  Extent :Refers to the contiguous set of data blocks, which is allocated as a unit to a SEGMENT.
  •  TABLESPACE :Refers to the final logical storage unit. It is mapped to physical datafile.
  •  Segment:Allocates a logical structure, such as table. It is a set of extents, which are stored in the same tablespace.

Following is the logical structure of the disk resources:


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