Showing posts with label Interviews. Show all posts
Showing posts with label Interviews. Show all posts

26 August 2014

Latest TSM Interview Questions - August 2014

  • Tell about yourself and work experience ?
  • Which ticketing tool are you using in your company ?
  • How do you assign tickets to yourself ?
  • What is Runbook  & SLA ?
  • Tell me about your TSM setup details ?
  • What are your daily activities ?
  • How do you check TSM Server health ?
  • What are the copy group parameters ? explain ?
  • How to Install & Configure BA client in AIX /Unix ?
  • What are the differences between TSM V5 and TSM V6 ?
  • What is Policy Domain & Policy Set ?
  • How many policy set and management classes can be defined ?
  • What are the default copy group parameters ?
  • Do we have to validate & activate policy set if we do any modifications to copy group parameters ?
  • What is the command to take incremental & selective backup ?
  • How to restore a file from particular date and time ?
  • How to find if a file is archived on a particular date ?
  • How do you retrieve a file from point time ?
  • What is expire inventory ?
  • What is reclamation ?
  • Difference between reclamation & collocation ?
  • How to move data ?
  • What is node decommissioning ?
  • During migration, what will you do if next storage pool is also full ?
  • What is migration ?
  • What is the difference between Backup & Archive ?
  • Difference between admin schedules & client schedules ?
  • How to check read and write errors in tape volumes ?
  • What is the difference between Physical Library & Virtual Tape Library ?
  • What is Library Manager and Library Clients ?
  • How do you check drive serial number in windows & Unix ?
  • How do you scan tape drives in OS level ?
  • How to configure storageagent/Lanfree  backup on AIX ?
  • How to configure Tape Library ?
  • Tell me the commands to checkin & checkout tape volumes ?
  • What will you do if you have no scratch volumes and no storage slots available in the library ?
  • What will you do if you need scratch tapes immediately and you have no new tapes ?
  • What will you do if TSM DB size gets full ?
  • How to increase TSM DB size on TSM V6 ?
  • What is the maximum value of Activelog ?
  • How do you increase active log size ?
  • How to check if last TSM DB backup is successful or failed ?
  • If my disk storage pool is full, what will you do ?
  • How to update migration to a disk storagepool ?
  • How do you restore oracle db backup from production system to another test system using TDP Oracle ?
  • How to configure TDP Domino, TDP SQL and TDP Oracle clients ?
  • How to link library files during TDP oracle configuration ?

10 April 2014

EMC Clariion (SAN) Interview Questions

  • Explain Clariion architecture ?
    emc clariion interview questions
  • Hardware Models of Clariion ?
  • What are the differences between Clariion CX-3 series and CX-4 Series ?
  • What are the Hardware components of Clariion ?
  • What are the management tools for Clariion ?
  • How to Initialize Clariion Array ?
  • What is Access Logix and How do you enable it ?
  • Why Access Logix has to be enabled ?
  • What are Vault drives and how much capacity they use ?
  • What is CMI (Clariion Message Interface) ?  
  • What are the I/O Operations in Clariion ?
  • Use of SPs ?
  • What is Storage array in Clariion ?
  • Create Storage group ?
  • How to manually restore failed paths in Clariion ?
  • How do you gather SP Collects ?
  • How do you upgrade the NaviSphere Manager ?
  • What are steps to assign a LUN to existing Host ?
  • Explain step by step procedure for storage provision to the new host ?
  • How do create capacity planning reports in Clariion ?
  • What is HEAT report ?
  • How do you enter into the Engineering Mode and what are the activities we can perform in Engineering Mode ?
  • How do you create a meta LUN ?
  • Explain step by step procedure for LUN migration ?
  • What is Private LUN Pool ?
  • What is Reserved LUN Pool ? 
  • How do you deregister the hosts from NaviSphere ?
  • How do you create a user and assign access rights ?
  • How do you monitor Clariion alerts ?
  • What is the recommended ration of Read and Write cache?

2 April 2014

EMC Storage Area Netwroks (SAN) Basic Interview Questions on Clariion, DMX and VMAX

  • What is Power path ?
  • Power pathCLI to manage disks  ?
  • List Power path policy ?
  • What is Vault drive ?
  • What is the PSM Lun ?
  • Basics of Storage ?
  • Define RAID ?
  • Which one you feel is good choice ?
    EMC Interview
  • StorageArray used in DAS ?
  • Explain iSCSI login, fabric login ?
  • Advantage of migration from DAS to SAN ?
  • What is Meta Lun ?
  • Explain Clariion architecture
  • Explain DMX architecture
  • Explain Enginuity operation layers
  • What is hard and soft zoning?
  • Explain WWN
  • What is zoning and how to create?
  • What is VSAN and how to create?
  • Hardware Models of clarion
  • What is FCID?
  • Explain Navishere/Symmtric Management console /ECC 22.Initialization of clarion array
  • Explain rule 17 in DMX
  • Why and how symmask, symld and symdg are used in DMX? 25. Symdev
  • Explain about symcfg
  • What is SYMAPI?
  • Configuration change in DMX
  • What is VCMDB?
  • Can windows, Linux, Solaris share the same FA in DMX? 31.What is Snap view?
  • What is Mirror view?
  • What is SAN Copy?
  • Explain Time finder and SRDF
  • Difference in iSCSI and NAS
  • What is IQN?
  • Explain SAN, NAS and CAS using devices used in these model 38.Difference in iFCP and FCIP
  • What is fabric?
  • What is RAID? Explain RAID3, RAID5 and RAID1/0
  • What is Hot Spare Disk?
  • What are the bay in DMX-3
  • Version and Model
  • Brief the Symmetrix CLI command
  • Create Storage group and add device into storage group in DMX. 46.Create Time Finder Clone using CLI
  • Composite Device group
  • How to create SRDF
  • What is iSCSI ?
  • What is Disk Controller?
  • How does data got saved in case of striping and incase of concatenation? 52.What is the minimum no. of disks required for RAID 5 and RAID 6? 
  • Difference between time finder and clone?
  • What is SRDF R1 & R2?
  • What is the version of Symmetrix DMX4?
  • In 4-24 what do 24 mean?
  • What is fabric?
  • Importance of RAID6?
  • How many disk failures RAID 5 supports? 60.Importance of masking?
  • Different RAID levels?
  • What is quorum disk and it is importance?
  • How to manually restore failed paths in Clariion?
  • Flash drives in DMX4?
  • What is LCC? Link Control Card
  • Storage provisioning in DMX?
  • Steps for zoning using CLI?
  • Describe SMCLI commands you have used
  • LUN, Base LUN and Metalun?
  • Difference between HP EVA 5000 and 8000?
  • What is CMI? Clariion Message Interface
  • What are the I/O operations in Clariion?
  • Use of SPs?
  • What is VMCDB?
  • What is Hyper?
  • What is a device in DMX?
  • What is SAN Kit?
  • Channel directors and disk directors?
  • What is global memory?
  • Difference between Emulex and Qlogic?
  • What is storage array in Clariion?
  • What FCID?
  • What is F-LOGI and P-LOGI? How authentication happens?

9 January 2014

Latest IBM TSM Interview Questions and Answers by IBM (2014)

IBM Tivoli Storage Manager (TSM) all rounds interview questions and answers to a one candidate. Interview took place in IBM India in January 2014 and it took place for more than 2 hours altogether.

TSM Interview Questions and Answers in 1st Round (by Team Leader)

1) What are your daily activities ?
Ans) TSM Server DB and Log size monitoring, client and admin schedule monitoring and library media management. I also have to install and configure TSM BA clients whenever required, and troubleshoot backup/restore issues if any. More details in TSM Daily Monitoring tasks.

2) What are first * and second * in the "Query Event * *" ?
Ans) First * is Domain name, second * is schedule name

3) How to check admin schedules status ?
Ans) Query Event * t=a

4) Where/How will you see, if errors occurred in the tapes ?
1. We can check it in actlog for hardware/media & read write errors by using command  - "q actlog se=errors"
2. To determine read/write errors for a particular volume run the command "q volume <volumename> f=d". 
This output will show the number of read/write errors occurred to that particular volume.

5) What is your DB size in your environment ?
Ans) Approximately 60 GB. 
Tip: size depends on your environment

6) What is your tape model ?
Ans) HP LTO4 tape - capacity 800 GB, speed is 120 MB/Sec.

7) Have you done DR test ?
Ans) Yes, In our environment we should do DR drills for every 6 months to ensure we are ready for any disaster recovery.

8) Have you done library configuration ?
Ans) Yess, I did it once.

9) What is your library model ?
Ans) IBM 3584 library model with 4 drives

10) Can you explain how to install and configure the tdpsql ?

11) What is the use of maximum number of mount points parameter ?
Ans) Maxnummp parameter is used to increase/decrease the client backup/restore sessions. This parameter value should not be greater than available tape drives.

12) What are the TSM server tuning parameters ?

13) What is collocation ? Where will you update it ?
Ans) Collocation is the process of keeping the client backed up data in a minimum number of tapes. Collocation can be done by nodes, node groups and by Filespace. We will update collocation while defining or updating storage pool definitions.

update stgpool <stgpoolname> colloc=node

14) What is cloptset ? Where will you update it ?
Ans) Cloptset is used to define a name for a set of options which you can assign to clients for archive, backup, restore, and retrieve operations. We should first define a clioptset name by using "define cloptset" command and then define each client options to that cloptset by using "define clientopt" command. Then you should use this cloptset name while defining any client node. Generally, cloptset is used to assign extra client options for any particular node from TSM Server end without logging into client machine.

15) Have you performed TSM DB restoration ?
Ans) Yes, 

16) How will you see the errors in the tape ?
Ans) To determine read/write errors for a particular volume run "q volume <volumename> f=d". This output will show the number of read/write errors occurred to that particular volume. Video tutorial on checking tape read write errors

17) What will you do if u find errors in the tapes ?
Ans) First we have to figure it out the source of the error, whether tape drive has caused the error or tape itself has some problems. If tape drive is the culprit make sure no other tapes are mounted on that particular tape. If tape itself has problems, then audit that tape by using "audit volume fix=no" command. This will show if there are any damaged files. IF there are no damaged files move the data from that tape to another tape, if there are any damaged files then we should restore the contents of that tape from copy storage pool.  Video tutorial on how to audit tape volume.

18) Have you done manual backup ?
Ans) Yes, We can do it by BA client command line and also through BA client GUI.

19) How will you login into the client machine do you have any credentials for you separately ?
Ans) Yes, I have client login credentials with limited privileges.

20) How many servers in your environment ?
Ans) 3 TSM Servers

21) What is the TSM library manager ?

22) On which TSM Server you will define tape drives in a shared tape library environment ?
Ans) We have to define all the drives on both Library Manager and Library clients. Configuration of TSM Library Manager

23) How will you see the lanfree backup process in the server side ? 
1. By running "storageagentname:q session"
2. Quering act log for "ANR0415I" message which says that "session  101 was proxies by storage agent S1 for node N1"
 3. You can also check the backup report for total lanfree bytes transferred.

24) How will you clean the drive ?
Ans) Generally tape library will have separate cleaning drives, we have to just mount that drive through Library GUI. OR From TSM Server we can run "clean drive" command, this will also mounts the cleaning cartridge/tape onto the drive and starts cleaning.

25) How to label the volume ?
Ans) If new tapes are kept in I/O exit port, run this below command
label libvol <libraryname> search=bulk labelsource=barcode checkin=scratch 

26) What are the parameters in the copy group ?
Ans) version exist, version deleted, retention extra, retention only, serialization, destination, mode, frequency …… etc.

27) What is the use of reclamation ?
Ans) Reclamation makes the fragmented space on volumes usable again by moving any remaining files from one volume to another volume. This action makes the original volume available for reuse. 

28) Is there any chance of moving inactive data from one volume to another using reclamation ?
Ans) No, reclamation will move both active and inactive data.

29) What is audit volume ?
Ans) Audit volume command is used to check the inconsistencies between database information and a storage pool volume.

30) What is fix=yes/no in audit volume command ?
Fix --- Specifies how the server resolves inconsistencies between the database inventory and the specified storage pool volume.
Fix=No --- Tivoli Storage Manager reports, but does not delete, database records.
Fix=Yes --- The server fixes any inconsistencies as they are detected

31) what is migration ? use of migration ?
Ans) Migration is used to move client files from one storage pool to the next storage pool in the storage hierarchy. Migration will make some empty space in disk pools which can be used for taking backup of the client machine. 

32) Have you done upgradation ? which method you have used ?
Ans) Yes, we used Same System Media Method

33) Have you done upgradation for client machine ?
Ans) Yes, First we have to copy all the important client configuration files, disconnect the connection with TSM Server and then uninstall/install new client version.

34) Have you done installation of  TSM server ? tell me the procedure ?

35) Explain the log flow in the 6.3 ?

36) What are the details available in the dsmsched.log and dsmerror.log ?
Ans) dsmsched.log  & dsmerror.log will contains the client schedule status details and any schedule error details.

37) Will the lanfree data go to the disk pool ?
Ans) No, Lanfree data will go directly to tape/tapepools. If we have a disk library in a SAN, then we can send lanfree to disks but we need another supporting softwares.

TSM Interview Questions and Answers in 2nd Round (Team Leader)

1) How to see the DB size ?
Ans) Query db f=d

2) How to check the paths ?
Ans) query path f=d

3) How to update path ?
Ans) update path sourcename destinationname srctype=server desttype=drive/library device=devicename online=yes

4) What is difference between search=yes and search=bulk in LABEL command ?
YES - Specifies that the server labels only volumes that are stored in the library
BULK - Specifies that the server searches the library entry/exit ports for usable volumes to label

5) In tdpsql what does tdpsql.cfg file contains ?
Ans) It contains all the tdpsql performance monitoring parameters like Buffers, Buffers size, sql buffers, sql buffer size, data stripes, and log file etc.

6) How to install tdpsql in the client machine ?

7) Any idea on TSM Offsite Reclamation ?

8) What is the use of storage pool backup (copy stgpools) ?
Ans) If there are any read/write errors on the primary pool volumes, we can restore them from copy pool volumes.

9) Explain how to do Lanfree configuration ?

10) Explain about policy management ?

11) What are the parameters in the copy group ?
Ans) version exist, version deleted, retention extra, retention only, serialization, destination, mode, frequency …… etc

12) Explain about Serialization ?
Ans) It specifies how Tivoli Storage Manager processes files or directories when they are modified during backup processing.

TSM Interview Questions and Answers in 3rd Round (Project Manager)

1) What is your company setup ?
Ans) We have total 4 TSM servers connected to 2 tape libraries........ etc.

2) How to do labeling ?

3) Have done up-gradation ?
Ans) Yes

4) What are your responsibilities ?

5) What is your team size ?
Ans) 3

6) What are the servers in your environment ?
Ans) AIX & Windows

7) How many clients ?
Ans) 10

8) How to find errors in the tapes ?

8 November 2013

EMC Storage Area Networks SAN basic L1 and L2 interview questions

  • Give a few CLI commands of Switch and Storage controller ?
  • What is the maximum out-standing requests in the storage controller ?
  • List some of the key intelligences of the Fibre Channel network ?
  • What are the three SAN deployment topologies ?
  • What are the steps involved for firmware up-gradations ?
  • What is the meaning of Disk controller ?
  • What are the Steps for No single point of failure ?
  • What are the tools used to measure storage performance ?
  • Why Raid 1+0 IS best for Database configuration ?
  • What is your approach in proactive measures ?
  • How you integrate SNMP to Storage to receive alert messages ?
  • What are some benefits of zoning ?
  • How do you achieve maximum protection in a SAN fabric ?
  • Why is the core-to-edge topology preferred in scalable fabric environments ?
  • What is Power path and list Power path policy4 ?
  • What is Vault drive ?
  • What is the PSM Lun ?
  • What is the Storage Array used in DAS 9 ?
  • Explain iSCSI login and fabric login ?
  • What are the advantages of migration from DAS to SAN 
  • What is Meta LUN ?
  • Explain Clariion architecture ?
  • Explain DMX architecture ?
  • Explain about Enginuity operation layers ?
  • What is hard and soft zoning ?
  • What is WWN number and where it is used ?
  • What is zoning and how to create zoning ?
  • What is VSAN and how to create it ?
  • What are the hardware models of clarion ?
  • What is FCID ?
  • Why and how symmask, symld and symdg are used in DMX ?
  • Can windows, Linux, Solaris share the same FA in DMX ?
  • What is Snap view ?
  • What is Mirror view ?
  • Difference in iSCSI and NAS36. What is IQN ?
  • Explain SAN, NAS and CAS using devices used in these model
  • What is RAID ?
  • Explain RAID3, RAID5 and RAID1/041 ?
  • What is Hot Spare Disk ?

26 October 2013

TSM L3 Interview Questions by IBM India

Tivoli Storage Manager Latest Interview Questions by IBM India. These questions are asked for L3 level TSM administrators. Most of the questions are scenario and troubleshooting based and there can be one or more answers. Please prepare answers for these questions correctly without confusion. Ask or consult any TSM expert or your manager before answering a difficult question. Hope this post help your interview..... Keep checking this blog for more latest interview questions.

IBM TSM L3 Level Interview Questions

  • What is the difference between 5.5 & 6.x TSM Versions ?
  • Explain about Recovery log structure in TSM 6.x versions ?
  • What is the default Dsmschedlog size ?
  • What is the Clopset, how do you define and explain about it ?
  • What TDP's you have in your environment ? explain their configuration ?
  • What are the different TSM Volume status and what is the meaning of STATUS=PENDING ?
  • Where will you see the reusedelay parameter ?
  • What is the Expiration proecess and its impact ?
  • Tell me about DRM process ?
  • In how many ways u can delete TSM db backup ?
  • How will you schedule to take total SQL DB backup ?
  • Difference between q occupancy and q audit occupancy commands ?
  • What are the new features added to Expire Inventory process ?
  • If Recovery log is 98% when Client backup is going on, what will you do ?
  • Someone has badly configured on client side, and I have to take backup of 3TB,  what I have to do ?
  • Suppose for one client, required retention period is 30 days, and for another client is  clients 365 days, what are the advantages and disadvantages of sending their backup to same storage pool ?
  • During TSM Db restore in AIX machine, restoration completed 80% and the rest is not able to complete, what might be the causes ?
  • Differences between TSM Backupset and image backup ?
  • What is the TSM Randomization ?
  • what is the TSM resource Utilization ?
  • What are the different types of TSM scheduling modes ?
  • What are the different TSM Server & TSM Client Tuning parameters ?
  • There are 100 tapes that are eligible for reclamation but there are no scratches available, How will you do reclamation ?
  • ANR9999D what does this error code represents ?
  • We have one client machine with 4 nodes with different dsm.opt files, each dsm.opt file will have Servername and nodename only. If suppose each node is assigned to one drive and only one mountpoint is configured, what are the advantages and disadvantages of this configuration ?
  • Tell me how to configure TSM Storage Agent ?
  • What is Offsite Reclamation ?
  • Long term retentions should be given but it should not archive, how to configure ?
  • Explain about Version Exist, Version Delete, Retention Extra and Retention Only parameters ?
  • Suppose if I give you new tape library and TSM Server, how do you configure ?