- Cisco Employee,
I have a small humble question about zoning.
When using JBOD, each physical disk had its own WWPN and FCID. The zoning configuration is for a server WWPN against disk WWPN so basically each server has its own disk.
Now for more advance storage systems (such as EMC) instead of physical disks to be mapped to servers we are mapping LUNs per server. I thought that for each LUN a WWPN and FCID are created and then you map the server to that LUN’s WWPN. Now I see that it does not work this way.
I have a UCS system with direct attached storage (EMC VNX5100). The active zoneset shows that all servers WWPNs are mapped to the same target WWPN (which is the EMC). There is a zone entry for each server.
So basically the result of that is that all servers can access the same target and the EMC controls the isolation of the LUNs from other servers.
If this is correct, then my question is why do I need the zoning configuration in this scenario ? why not set the default zone to permit and let EMC control LUN access?
BTW, this scenario of one storage system attached to the SAN is the same if we use Nexus 5k, so why bother and set zoning if the EMC can control the access to LUNs?