# Calculating the Storage Array Name for HPE Alletra Storage MP Storage Array

You need to calculate the storage array name only one time, even if you have more than one device on the storage array.

Note

This calculation only applies to the old HPE 3PAR storage array models that don't have WWN identifiers mentioned in the array software. For the new models, you can directly find the WWN identifier in the System details section of the array software.

## Before You Begin

To calculate the storage array name, use the World Wide Name (WWN) of any volume in the storage array.

## Procedure

To get the WWN identifier, complete the following steps from the HPE Alletra Storage MP Management console:

- If you have an 8-byte WWN, use the following formula:

  2FF7000 + WWN.substr(4,3) + 00 + WWN.substr(12,4)

  where:

  - WWN.substr(4,3) is the next 3 digits after the fourth digit of the WWN identifier

  - WWN.substr(12,4) is the next 4 digits after the twelfth digit of the WWN identifier

  Example

  WWN = 50002AC0012B0B95

  2FF7000 + 2AC + 00 + 0B95

  The storage array name is 2FF70002AC000B95.

- If you have a 16-byte WWN, use the following formula:

  2FF7000 + WWN.substr(4,3) + WWN.substr(26,6)

  where:

  - WWN.substr(4,3) is the next 3 digits after the fourth digit of the WWN identifier

  - WWN.substr(26,6) is the next 6 digits after the twenty sixth digit of the WWN identifier

  Example

  WWN = 60002AC5000000000000052200000B95

  2FF7000 + 2AC + 000B95

  The storage array name is 2FF70002AC000B95.

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