EMC Storage Product Knowledge Sharing

Registering Fibre Channel HBAs or iSCSI NICs with the storage system enables the storage system to see the HBAs or NICs. To register HBAs or NICs with the storage system, you will start or restart the Navisphere Agent on the host.Microsoft WindowsTo register the host’s HBAs with the storage system, start the Navisphere Agent as follows:1. On the Windows host, right click My Computer and select Manage.2. Click Services and Applications and then click Services.3. Find EMC Navisphere Agent service.4. If already...

I have been receiving mail to write on basic storage topic rather than only EMC. Here is first basic thing to know about FC technology.Fibare Channel is nothing but just a medium to connect host and shared storage. When we talk about SAN first things comes in mind about Fibre Channel.Fibre Channel is serial data transfer interface intended for connecting shared storage to computer. Where storage is not connected physically to host.Why FC is most important in SAN? Because FC gives you high speed through the following process:1)...

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...

Lets first disuss what is Powerpath software. If you are familiar with EMC product and then definitelly will be using EMC Powerpath software. Those who are new to storage world, it will interesting to know about this product as there are only few software in this category like DMP,PVLINK, LVM etc from other vendor. This sofware is one of the most robust compare to other, thats reason EMC generationg more revenue out of this Product.......

SUN/SOLARIS___________To display what HBA's are installed.#prtdiag -v#dmesg#cat /var/adm/messages grep -i wwn moreTo set the configuration you must carry out the following:-changes to the /etc/system file-HBA driver modifications-Persistent binding (HBA and SD driver config file)-EMC recommended changes-Install the Sun StorEdge SAN Foundation packageChanges to /etc/system: ( Plz ignore 3 equal sign when u edit the file)SCSI throttle === set sd:sd_max_throttle=20Enable wide SCSI === set scsi_options=0x7F8SCSI I/O timeout value...

I tried to collect some good information on iSCSI driver details which was request by some reader. Hope this will help you on iSCSI queries. Leave comment if it is useful... I will try to write iSCSI overview in next entry. Happy Reading!!!!!!The iSCSI driver provides a transport for SCSI requests and responses to storage devices via an IP network instead of using a direct attached SCSI bus channel or an FC connection. The SN 5400 Series Storage Router, in turn, transports these SCSI requests and responses received via the IP...

You have two fabrics running off of two switches. You'd like to make them one fabric. How to do that? For the most part, it's simply connecting the two switches via e_ports. Before doing that, however, realize there's several factors that can prevent them from mergingg Incompatible operating parameters such as RA_TOV and ED_TOV Duplicate domain IDs. Incompatible zoning configurations No principal switch (priority set to 255 on all switches) No response from the switch (hello sent every 30 seconds) ...