Posts in Storage

Partition Alignment in a Windows-Based Environment Using the DiskPart Utility

Alignment of disk partitions can have a huge performance impact, particularly for database servers. Incorrect alignment from an out-of-the-box installation could tax a system’s I/O performance as much as 35%, depending on the type of activity (1). Partitioning, and therefore partition alignment, is one of the first things to happen when a server is being built. A mistake in that early step can negatively affect the performance of the I/O subsystem for the life of a production database server. And yet it was not long ago that it seemed nobody in the DBA community had ever heard of partition alignment.

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