Srik1920
2 Iron

why no change in WWN,when faulty director is replaced with new one?

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Hi,

After replacing faulty director with new one,how we are still having same old wwn?

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RobertDudley
3 Argentium

Re: why no change in WWN,when faulty director is replaced with new one?

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The WWN's are not bound to the particular director as the WWN is built off the array serial number being run through an algorithm.  This way the WWN's for any director in an EMC storage array never change and are still unique.

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Baas786
1 Copper

Re: why no change in WWN,when faulty director is replaced with new one?

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Hi

When replacing a faulty director only the so called director main board with memory modules are replaced. The FA ports is left un touched as its a separate component all together.

RobertDudley
3 Argentium

Re: why no change in WWN,when faulty director is replaced with new one?

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The WWN's are not bound to the particular director as the WWN is built off the array serial number being run through an algorithm.  This way the WWN's for any director in an EMC storage array never change and are still unique.

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sauravrohilla
3 Cadmium

Re: why no change in WWN,when faulty director is replaced with new one?

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WWNs are regenerated and assigned to the new FA ports just as Robert described.

regards,

Saurabh

Re: why no change in WWN,when faulty director is replaced with new one?

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Imagine if the WWN would change, then you would have to change SAN Switch zoning Db too. Static WWPN is a delebrate attempt to avoid multiple changes after part replacement.

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