WWN zoning is susceptible to unauthorized access, as the zone can be bypassed if an attacker is able to spoof the World Wide Name of an authorized HBA.Įxplain The Device Masking Architecture In Storage Arrays? A major advantage of WWN zoning is the ability to recable the fabric without having to redo the zone information. WWN zoning uses name servers in the switches to either allow or block access to particular World Wide Names (WWNs) in the fabric. Logical Unit Number or LUN is a logical reference to entire physical disk, or a subset of a larger physical disk or disk volume or portion of a storage subsystem. Some storage controllers also support LUN Masking. LUN Masking implemented at this level is vulnerable to any attack that compromises the HBA. LUN Masking is implemented primarily at the HBA (Host Bus Adapter) level. The purpose of using LUN masking is to write volume labels at the windows based servers, and also renders the LUN mask system unusable by any other operating system and reduces the data loss.LUN (Logical Unit Number) Masking is an authorization process that makes a LUN available to some hosts and unavailable to other hosts. LUN can be implemented at the HBA level (HOST bus adapter). For ease of use, you can associate an ASCII World Wide Name (AWWN) with each WWN.Īns: LUN is a Logical unit number, which offers an authorized process available for some host. Both HBA and storage arrays director ports in their Channel topology are uniquely identified by a 64-bit World Wide Name (WWN). A device masking database, based in the storage arrays unit, eliminates conflicts through centralized monitoring and access records. Device masking lets you control your host HBA access to certain storage arrays devices.This can render the LUN’s unusable by other operating systems and can result in data loss. LUN Masking is important because Windows based servers attempt to write volume labels to all available LUN’s. Get EMC Training with Industry Oriented Topics By Real Time Expertsģ6) What does the control Center storage agent monitor?ģ7) When is the Port Bypass Card used on a Symmetrix DMX?ģ8) Which of the Celerra data replication options provides a point-in-time filesystem copy over IP?Īns: Enables distribution of traffic over the combined bandwidth of two or more ISLs and increases availabilityĤ0) What are features of Celerra Replicator?Īns: Synchronous data recovery, Point-in-time copy over an IP networkĤ1) Which protocol does open systems hosts use to access storage in Fibre Channel SANs?Ĥ2) Which NetWorker host performs the backup of the bootstrap save set?Īns: Server during a server-initiated backupĤ3) Which product is used to create Logical Volumes on a Symmetrix system?Ĥ4) Which Symmetrix connectivity options can be used with mainframe hosts?Ĥ5) Which control center view provides a single graphical view of the whole environment, including consolldated alters and threshold charts?Ĥ6) Which set component is required for write caching to be enabled in a CLARIION array?Īns: 2 power supplies, 2 storage processors,2 LCC cards and at least one standby power supplyĤ7) What is a benefit of using zoning in a SAN?Ĥ8) What is a characteristic of enterprise directors?Ĥ9) Which java based interface manages standalone MDS-Series switches?ĥ0) Which protocol is used by open system hosts to access block level storage over IP?ĥ1) What is a characteristic of a Content Address in Centera?ĥ2) What is the use of Internet Control Message Protocol ICMP?Īns: Sends administrative information between network devicesĥ3) What is the purpose of storage groups in a CLARiiON storage array?Īns: LUN (Logical Unit Number) Masking is an authorization process that makes a LUN available to some hosts and unavailable to other hosts. This also helps to limit the unintentional generations, propagation, and operates without the need for mutual interfaces. All electronic devices are very potential devices to emit different electromagnetic fields. EMC establishes the bridge between electrical and electronic equipment in the electromagnetic environment. Ans: EMC stands for Electromagnetic compatibility, which enables various electronic devices to work without the use of mutual interference.
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