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Home > Success Center > Storage Manager (STM) > STM - Knowledgebase Articles > How EMC VMAX calculates total IOs

How EMC VMAX calculates total IOs

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Overview

This article provides information on how EMC VMAX calculates the total IOs.

 

Formula for calculating total IO's for the entire storage system:

TotalIO = ∑ TotalIOs of Adaptors(FE + BE + SRDF)

Formula for calculating total IO's for the LUN:

 

TotalIO’s = ReadIOs + WriteIOs + EMCSequentialReadIOs + EMCSequentialWriteIOs

 

Note:  The only caveat about this is that EMCSequentialWriteIOs is only available on a per volume basis. It is not available for the whole array. The CIM class it belongs to is Symm_StorageVolume and not Symm_StorageSystem.

Environment

All STM versions

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