Do you have your data on SCSI disks ?
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z/VSE can access a SCSI disk through a port (CHPID) of an IBM System z Fibre Channel Protocol (FCP) adapter. One z/VSE system may connect to one physical port or multiple systems may share one physical port with N-Port ID Virtualization (NPIV).
Today a few words about NPIV. Thanks to my colleague Monika for details.
With NPIV the FCP adapters (CHPIDs) can be shared by multiple operating systems.
The Service Element (SE) creates new worldwide port names (WWPNs - identifies the port in a storage network) for the FCP adapter. A unique WWPN is assigned to each subchannel of the adapter, that is each operating system sharing the adapter has its own WWPN.
NPIV is available on IBM System z9, z10 and zEnterprise processors.
Advantages of NPIV:
1) Access rights: NPIV allows to define more granular access rights for LUNs (SCSI disks).
2) DASD sharing: With NPIV you can share the same SCSI disk (LUN) between z/VSE systems.
3) Isolation: Operating systems using the same physical FCP adapter cannot interfere with each other.
4) Cost: Sharing of a FCP adapter among operating systems can save cost (for additional adapters).
Therefore we recommend to use NPIV.
For more details about z/VSE's SCSI support please read the SCSI white paper on our