EMC Storage Product Knowledge Sharing

MDS Interoperability Mode Limitations When a VSAN is configured for the default interoperability mode, the MDS 9000 Family of switches is limited in the following areas when interoperating with non-MDS switches: • Interop mode only affects the specified VSAN. The MDS 9000 switch can still operate with full functionality in other non-interop mode VSANs. All switches that partake in the interoperable VSAN should have that VSAN set to interop mode, even if they do not have...

What are the CLARiiON SAN fan-in and fan-out configuration rules?"Fan-In Rule: A server can be zoned to a maximum of four storage systems. Fan-Out Rule: For FC5300 with Access Logix software - 1 - 4 servers (eight initiators) to 1 storage system. For FC4500 with Access Logix - 15 servers to 1 storage system; each server with a maximum of one (single) path to an SP. For FC4700 with Base or Access Logix software 8.42.xx or higher - 32 initiators per SP port for a maximum of 128 initiators per FC4700....

Save Set Staging: Save set staging is a process of transferring data from one storage medium to another. Staging reduces the time it takes to complete a backup by directing the initial backup to a high performance file type or adv_file device. The data can then be staged to a storage medium, freeing up the disk space. Any volume type, such as Default, Index Archive, or Default Clone, can be staged. Staging is particularly well suited for data that has been backed up on file type or adv_file devices....

There is available WWN decoder tool for EMC but I am going to discuss how to decode manually?Each Symmetrix SAF port, RAF port, EF ficon port or DAF port (DMX only) has a unique worldwide name (WWN). The WWN is associated with the Tachyon chip on the director. It was intended to remain unique per director so that the director can be accessed on a storage area network. The Symmetrix SAF/RAF/DAF/EF WWN is dependent on the Symmetrix serial number, the director number, the processor letter, and the port on the processor. When...

Generally we never give thought about VCMDB database once we initialize first time. It does make sense when you messup or did some thing disaster. This database is most impppppportaaaaaaant for DMX. Once you loose this database means you can't get DMX configuration back at any cost. So, I am discussing different type of VCMDB on DMX.We can now support up to 16,000/64000 addressable devices enginuity 5771 onward and therefore the Volume Control Manager Database needs to be physically larger. At 5670, as per EMC recommend CE's...

Vendor Worldwide Names WWN :Twenty-four of the sixty-four bit •World Wide Name• must be unique for every vendor. A partial listing of those vendors most familiar to EMC with regard to Symmetrix Fibre Channel connectivity.If decoding a HBA WWN, then issue an 8f, command to view the WWN in the FA login table. Bytes 1-3 of the World Wide Names contain the unique vender codes. Note that if there is a switch connected between the FA and the host bus adapter, then the name and fabric servers of the switch will login to the FA. These...

Brocade Switches:How to merge two switches with different active zone sets."Merging Two B-series Directors and/or Switches with Different Active Zoning ConfigurationsBefore Beginning The following procedure is disruptive to fabric traffic.:--It will require disabling the switch and the removal of the effective zoning configurations at one step. Removing this configuration will stop the data flow. Since this step in the procedure takes only a few moments to complete, data should resume as soon as the new configuration is activated.To...