Sun Storage 3310/3320/3510/3511 Arrays: Identifying and Resolving an Incorrect "Controller Unique Identifier"
Last updated on AUGUST 12, 2013
Applies to:Sun Storage 3310 Array - Version Not Applicable and later
Sun Storage 3320 SCSI Array - Version Not Applicable and later
Sun Storage 3510 FC Array - Version Not Applicable and later
Sun Storage 3511 SATA Array - Version Not Applicable and later
Occasionally, as a result of some maintenance operation or cloning NVRAM from one Sun Storage 3310/3320/3510/3511 Array to another, the following two issues may occur:
- Multiple arrays will exhibit the same Ethernet or MAC address.
- The unique worldwide names may change resulting in change of DIDs (device ids) which are used for Solaris Cluster configurations.
This document will explain why this problem happens, and includes steps to resolve it.
The Controller Unique Identifier, hence referred to as CUI, is used to create Ethernet (MAC) addresses and worldwide names.
The CUI is by default generated from the chassis serial number. On a working array, if this CUI is changed, both the MAC address as well as the worldwide names will change, thereby causing problems at the host end.
For smooth operation of the array, we must ensure that the CUI always remains the same after any maintenance activity.
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