Storage Admin Interview Questions Answers

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<ul><li><p>Guide Lines</p><p>Speak slowly and clearly Do not speak loudly Be confident with your answers Do not argue with the interviewer Accept your mistakes Ask him to repeat the question if it is not clear Preserve professional conversation (Politely and Friendly) Be confident and positive Before you go to the interview go through your resume properly Before you attend the interview study about the organization</p><p>What are the day to day activities in your current profile?</p><p>Explain about day to day activities in your current profile. </p><p>Example: Monitoring alerts using Monitoring Tool like EMC Control Center Follow-up for the pending service requests Checking ticketing tool for any new tickets Updating the tickets with the current status Responding to the assigned service requests Documenting the service request solutions Performing Health checks Preparing Job plans for changes Participating bridge calls if any Attending internal/customer meetings, etc</p><p>Explain about roles and responsibilities in your current profile </p><p>Example: Providing L2 support for the EMC DMX and Clariion storage Performing upgrades/downgrades of Firmware Storage Provisioning for new hosts Storage Provisioning/ reclamation for existing hosts Performing Zoning Troubleshooting Switch issues Troubleshooting storage issues Troubleshooting Performance issues </p></li><li><p>Vendor /customer management during the hardware failure issues Performing Changes and preparing job plans for changes Performing TimeFinder/Mirror Operations Performing SRDF Operations Troubleshooting failed SRDF/TimeFinder jobs Monitoring Storage environment using Monitoring Tools (ECC) Preparing Storage Capacity planning reports Performing Disaster Recovery Activities.etc</p><p>What is the first thing you will do at office?</p><p>Example: Checking the mails for any escalations/ alerts/ new assignments Checking the monitoring tools for any critical alerts on console Checking the ticketing tools for newly logged service requests Checking the pending issues.etc.,</p><p>Explain about your current storage environment like about Arrays, Connectivity, Replication technology, DR environment, Management tools, Monitoring tools, etc., </p><p>Example: We are having One Data Center and One DR Center and 16 branch offices. In Data Center and DR Center we have 2 Symmetrix DMX-4 Arrays; each box is having 800TB of data. For backup purpose we are creating mirrors in data center using TimeFinder/Mirror technology and for local/fast restoration we are creating snaps using TimeFinders/SNAP technology. For remote replication (remote backup and DR purpose) we are using SRDF/S technology. Each Brach offices are having CX series Clariion Arrays, For backup purpose we are creating SnapView Clones and for fast/local restoration we are creating SnapView Snapshots. We are using symcli for storage operation for DMX Arrays and Navisphere Manager for Clariion Arrays, Connectrix Manager for switch directors management, cli for individual brocade switches, for monitoring storage environment, Storage Scope reporting, performance monitoring </p></li><li><p>we are using EMC Control Center, Replication Manager for automating the TimeFinder/Mirror operations, Power path for path redundancy at host-end. Connectivity between the Data center and DR center is over Fibre Channel. Connectivity between the branch offices and DC/DR is over Ethernet</p><p>Explain whatever management tools you are using. </p><p>Example: We are using Symcli/SMC/ECC for DMX Arrays storage provisioning We are using Navisphere Manager for Clariion storage provisioning We are using connectrix manager for Directors management We are using cli/GUi for Individual switches management We are using EMC Control Center for Alerts management/monitoring We are using EMC Control Center for Storage Scope reporting We are using EMC Control Center for Performance Monitoring We are using Replication Manager for automating the TimeFinder/Mirror/Clone jobs We are using symcli for managing and monitoring SRDF jobs We are using Power path for path management at host end</p><p>How are you monitoring your Storage environment?</p><p>Explain about the Monitoring tools using in your organization </p><p>Example: EMC Control Center, etc</p><p>How are you getting the tickets/service requests?</p><p>Explain ticketing tools using in your organization. </p><p>Example: Getting tickets through telephone Getting tickets through emails Getting tickets in ticketing tool Self logged tickets (if we found any critical alerts on management tool, we create tickets our self), etc.,</p></li><li><p>Explain step by step procedure to close the received ticket?</p><p>Explain about ticket closure procedure in your current organization. </p><p>Example: Received the tickets/Service requests/Service orders via telephone/ mails/ web portal, etc. </p><p>Ticket Priority (S1/S2/S3 or P0/P1/P2/P3) Customer/ Helpdesk/ Service desk will set the priority. </p><p>Engineer will work on ticket, once it is resolved he will take the confirmation/ approval to close the ticket from the end user who hasraised the ticket and will update the ticket with the findings and resolution then he will close the ticket. </p><p>If not resolved: Lack of Experience /un-known problem Change Required Hardware failure </p><p>Lack of Experience/ Unknown problem: Inform to helpdesk or whoever assigned the ticket to you for escalation with your findings? </p><p>Change Required Update the ticket with your findings Inform to the end user, server/device owner Raise a change request if you are responsible or inform to owner to raise the change request Coordinate with all teams who are all involved in this change Schedule the change and get it done Update and close the ticket after getting the confirmation from the end user </p><p>Hardware failure: Inform your findings to the end user Provide work around/alternate solution for time being if possible Update the ticket with the progress Check whether this failure can be done by internal team or vendor support is required If vendor support is required log a service request with the vendor</p></li><li><p>If yes take the necessary approvals from server/device owner, team lead or who ever involved Schedule the change as per approvals Inform to vendor about change schedule and get it resolved the problem Once it is resolved check with the users who are affected with this problem and take the confirmation/approval to close the ticket Update the ticket and close </p><p>When you initiate the change what are your responsibilities?</p><p>Explain about the procedure you are following in your current organization. </p><p>Example: Whenever it is required to perform the change, I will inform to my Manager and will take approval to proceed further. I will prepare the job plan for the change. I will raise the change request with the schedule timings and will take the necessary approvals from concerned teams who will affect with this change. I will perform the change according to the job plan. I will cross check all operation running smoothly? I will take the confirmation from all teams. I will update the change request and will close. </p><p>Tell me one critical situation you have handled?</p><p>Explain about a critical situation which you have handled in the present job.</p><p>Why do you want to leave your present organization?</p><p>Tell him the reason why do you want to leave the present company, keep in mind that the answer should be positive. </p><p>Example: Career growth. Change of location necessity. Expecting large scope of work, etc., </p><p>Why do you want to join in this organization?</p><p>Explain why you want to join in this organization </p></li><li><p>Example: This organization is having 100,000 employees </p><p>So many years of existence in the industry </p><p>There are lot of opportunities for career growth in this Organization,</p><p>re there any questions you would like to ask us?</p><p>Ask one or two questions if you want a clarification on any topic during interview </p><p>Example: Can you please tell me the project details Working location and Shift timings May I know the storage environment in this project? What will be the scope of work of mine in this project How is the career growth in your organization, etc.,</p><p>SAN INTERVIEW QUESTION AND ANSWER</p><p>Can you describe SAN in your won word?</p><p>A storage area network (SAN) is a high-speed special-purpose network (or subnetwork) that interconnects different kinds of data storage devices with associated data servers on behalf of a larger network of users. Typically, a storage area network is part of the overall network of computing resources for an enterprise. A storage area network is usually clustered in close proximity to other computing resources such as IBM Power5 boxes but may also extend to remote locations for backup and archival storage, using wide area network carrier technologies such as ATM or SONET.</p><p>A storage area network can use existing communication technology such as IBMs optical fiber ESCON or it may use the newer Fibre Channel technology. Some SAN system integrators liken it to the common storage bus (flow of data) in a personal computer that is sharedby different kinds of storage devices such as a hard disk or a CD-ROM player.</p><p>SANs support disk mirroring, backup and restore, archival and retrieval of archived data, data migration from one storage device to another, and </p></li><li><p>the sharing of data among different servers in a network. SANs can incorporate subnetworks with network-attached storage (NAS) systems.</p><p>So you mention NAS, but what is NAS?</p><p>Network-attached storage (NAS) is hard disk storage that is set up with its own network address rather than being attached to the department computer that is serving applications to a networks workstation users. By removing storage access and its management from the department server, both application programming and files can be served faster because they are not competing for the same processor resources. The network-attached storage device is attached to a local area network (typically, an Ethernet network) and assigned an IP address. File requests are mapped by the main server to the NAS file server.</p><p>Network-attached storage consists of hard disk storage, including multi-disk RAID systems, and software for configuring and mapping file locations to the network-attached device. Network-attached storage can be a step toward and included as part of a more sophisticated storage system known as a storage area network (SAN).</p><p>NAS software can usually handle a number of network protocols, including Microsofts Internetwork Packet Exchange and NetBEUI, Novells Netware Internetwork Packet Exchange, and Sun Microsystems Network File System. Configuration, including the setting of user access priorities, is usually possible using a Web browser.</p><p>What is SMTP and how it works?</p><p>SMTP (Simple Mail Transfer Protocol) is a TCP/IP protocol used in sending and receiving e-mail. However, since it is limited in its ability to queue messages at the receiving end, it is usually used with one of two other protocols, POP3 or IMAP, which let the user save messages in a server mailbox and download them periodically from the server. In other words, users typically use a program that uses SMTP for sending e-mail and either POP3 or IMAP for receiving e-mail. On Unix-based systems, sendmail is the most widely-used SMTP server for e-mail. A commercial package, Sendmail, includes a POP3 server. Microsoft Exchange includes an SMTP server and can also be set up to include POP3 support.</p><p>SMTP usually is implemented to operate over Internet port 25.</p><p>Do you have any idea about NAT?</p></li><li><p>Short for Network Address Translation, an Internet standard that enables a local-area network (LAN) to use one set of IP addresses for internal traffic and a second set of addresses for external traffic. A NAT box located where the LAN meets the Internet makes all necessary IP address translations.</p><p>NAT serves three main purposes:</p><p> Provides a type of firewall by hiding internal IP addresses Enables a company to use more internal IP addresses. Since </p><p>theyre used internally only, theres no possibility of conflict with IP addresses used by other companies and organizations.</p><p> Allows a company to combine multiple ISDN connections into a single Internet connection.</p><p>Explain DHCP and its uses to an environment?</p><p>Short for Dynamic Host Configuration Protocol, a protocol for assigning dynamic IP addresses to devices on a network. With dynamic addressing, a device can have a different IP address every time it connects to the network. In some systems, the devices IP address can even change while it is still connected. DHCP also supports a mix of static and dynamic IP addresses.</p><p>Dynamic addressing simplifies network administration because the software keeps track of IP addresses rather than requiring an administrator to manage the task. This means that a new computer can be added to a network without the hassle of manually assigning it a unique IP address. Many ISPs use dynamic IP addressing for dial-up users.</p><p>What does SNMP stands for?</p><p>Short for Simple Network Management Protocol, a set of protocols for managing complex networks. SNMP works by sending messages, called Protocol Data Units, to different parts of a network. SNMP-compliant devices, called Agents, store data about themselves in Management Information Bases and return this data to the SNMP requesters.</p><p>What do you know about TCPDump?</p><p>TCPDump is a common computer network debugging tool that runs under the command line. It allows the user to intercept and display TCP/IP and other packets being transmitted or received over a network </p></li><li><p>to which the computer is attached. TCPDump works on most Unix-like platforms: Linux, Solaris, BSD, Mac OS X, HP-UX and AIX among others. On Windows, WinDump can be used; its a port of tcpdump to Windows.</p><p>You must have a root or super user authority to use TCPdumps in UNIX like environment.</p><p>What is software RAID Levels do?Redundant Arrays of Independent Disks (RAID) is formally defined as a method to store data on any type of disk medium.</p><p>LDAP</p><p>The Light Directory Access Protocol (LDAP) defines a standard method for accessing and updating information in a directory (a database) either locally or remotely in a client-server model.</p><p>What are the benefits of fibre channel SANs?</p><p>Fibre Channel SANs are the de facto standard for storage networking in the corporate data center because they provide exceptional reliability, scalability, consolidation, and performance. Fibre Channel SANs provide significant advantages over direct-attached storage through improved storage utilization, higher data availability, reduced management costs, and highly scalable capacity and performance.</p><p>What environment is most suitable for fibre channel SANs?</p><p>Typically, Fibre Channel SANs are most suitable for large data centers running business-critical data, as well as applications that require high-bandwidth performance such as medical imaging, streaming media, and large databases. Fibre Channel SAN solutions can easily scale to meet the most demanding performance and availability requirements.</p><p>What customer problems do fibre channel SANs solve?</p><p>The increased performance of Fibre Channel enables a high...</p></li></ul>