In Microsoft Exchange environments, you can use the Exchange eseutil tool to perform database scans for validation purposes. Exchange database scans usually access data by using a sequential read pattern. By enabling logical extents, you improve Exchange sequential read performance and database validation time.
A logical extent is a group of data blocks that are logically aligned and logically contiguous. When you enable logical extents, Data ONTAP processes write operations by creating groups of logically contiguous data blocks that are physically close to each other on the disk. Extents optimize sequential data block layout and improve the amount of time required for applications to perform sequential read operations, such as database scans.