Sun StorageTek VTL Storage Appliance
 
Sun StorageTek VTL Value System
 
Sun StorageTek VTL Plus Storage Appliance
 

GCS>Sun Microsystems>Storage - Tape>Tape Virtualization
 

Problem Statement:

There are several identifiers associated with each tape drive:

� Serial number � assigned to the drive at the factory

� Element number � assigned according to where the drive is placed in the library

� LUN number � assigned either by software or by setting a parameter or a switch on the drive

� Device address � assigned by the operating system on the client system

In a VTL, these are augmented by:

� VTL Drive Name � Assigned in the VTL

� Fibre Channel Target WWPN � The VTL Fibre Channel Port Name for this drive

� Fibre Channel Initiator WWPN � The client system Fibre Channel Port Name for this drive

All these identities must line up. That is to say, whether the backup software addresses a tape drive by element number or LUN number or device address, the same drive must respond.

Method:

Maintain a table with all the information for all the tape drives. At a minimum, track the seven pieces of information outlined above. The following pieces of information can be supplied by the VTL console:

� VTL Drive Name � Assigned in the VTL

� Serial number � assigned to the drive at the factory

� Element number � assigned according to where the drive is placed in the library

� LUN number � assigned either by software or by setting a parameter or a switch on the drive

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