HP Surestore Disk Array FC60 HP SureStore E Disk Array FC60 - (English) Advanc - Page 293
Unbinding a LUN, Changing LUN Ownership
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Unbinding a LUN Unbinding a LUN makes its capacity available for the creation of a new LUN. All disks assigned to the LUN are returned to the Unassigned disk group when the LUN is unbound. CAUTION All data on a LUN is lost when it is unbound. Make sure you backup any important data on the LUN before unbinding it. Unbinding a LUN will have the same impact on the host as removing a disk. Before unbinding a LUN, check your operating system documentation for any additional information or steps that may be required after unbinding a LUN. To unbind a LUN, type: amcfg -D [-force] • LUN - number assigned to the LUN you want to unbind • The -force option is required to delete LUN 0. LUN 0 may only be deleted if a UTM LUN has been enabled via NVSRAM setting. If UTM is disabled, LUN 0 is required for the SCSI command path. The UTM LUN itself may not be deleted using this command. Command Example The following example unbinds LUN 5 on disk array rack_1. amcfg -D 5 rack_1 Changing LUN Ownership When binding a LUN, one of the disk array controllers is identified as the owner of the LUN. It is possible to change the ownership of a bound LUN dynamically - that is, without unbinding and rebinding the LUN. You may want to change the ownership of a LUN if you notice an imbalance of I/O loading between controllers. Controller ownership will change automatically if a failure occurs in the primary I/O path to the LUN. Managing the Disk Array Using Array Manager 60 293 Managing the Disk Array on HP-UX