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net backup interview questions

Created: 26 May 2009 • Updated: 10 Aug 2011 | 42 comments
This issue has been solved. See solution.

Hi friends,

I am preparing Solaris netbackup and wants to grow up my carrier in this field> I am having some interview questions if u provide me yours email id i will forward. plz do the same for me if you have any interview questions.plz

Thanks & regards

chandra

Comments 42 CommentsJump to latest comment

rookie11's picture

if u wanna share some questions u can paste them here itself and ask others to put some questions

Gigabyte's picture

1. If you have a SCSI attached robot and in device monitor you see the drives marked as AVR, what does that mean and how would you fix it?
2. If I asked you to tell me if a client has Netbackup on it just by using a telnet command what would you do?
3. If you wanted to know what IP address netbackup was using to perform backups what command would you run and where would you run it?
4. What is flash backup?
5. How is image stored in netbackup
6. If a media ID A04567 comes back and it is frozen, what are the steps to unfreeze it and move it back to scratch from the command line?
7. If you wanted to bypass netbackup commands and move a tape from slot 1 to drive 3 how would you do that?
8. What is the client version supported by NBU 6.x and 5.x masters
9. If your last catalog backup was two days ago and the master server crashed what would you have to do to bring your environment back up to present time?
10. How do you find a disk based image via the command line and then delete it?
11. How do you import an NBU image that has been written to a disk storage unit?
12. What are the critical catalogs or databases on a Media Server?
13. How would you tune NetBackup to increase backup performance?
In which location(path) the temp files located in Netbackup for Windows/Unix?
14.What is the process of importing images and why do we import images?
15.How to Importing and expiring images?
16.What does it mean by inventoring a robot?
17.What is SAN media server?
18. How to check tape is bad?
19. How to check the tape is already expired or not?
20. How to check volume pool?
21 Media has been already expired, How to find out?
22. How to check tape is in cap?
53. How to see log entries, how to create log directories?
24.SQL Script.. in client..how to create?
25. How to install media server(with device configuration steps)?
26.what is avr mode

27. There is a Tape library with 10 drives ...Can we able to create 2 Storage units.....?

28.There are 1000 Client machines , 999 machines are transferring datas in good speed but one client machine is taking too long to transfer a datas ..... That is ...backup should complete within 2 hours ..but after 12 hours and more ...the data transfer is still happening.... why?

Andy Welburn's picture

Or is it something you are having an issue with & want assistance in resolving?

If the latter it would be better if you opened a new discussion!

chandrasekhar's picture

Hi friends,
 
     I am preparing for Solaris & veritas net backup UNIX mode and wants to grow up my carrier in this field so plz give me the material for interview point of view, and also
give questions which is asked.

i am having some interview questions if you provide me yours email id I will forward. please do the same for me if you have any interview questions & Solutions.

1. What is User Backup,User Archive & How to take?
2. Difference between 5.x, 6.x VNB
3 .In which location(path) the temp files located in Netbackup for Windows/Unix?
4. How do you configure a client for automatic backups?
5. What's the difference between diff incr and cumulative incr? What happens when I mix them on Windows client... Unix client?
6. How is a changed file determined on Unix?
7. When would I, or would I not, use cross mount points?
8. What is the difference between a Volume Group and a Volume Pool?
9. How do you back up the catalog? Why is this important? What do you have todo if you don't have a catalog backup?
10. How do you recover the catalog?
11. How do you configure retention levels for a backup?
12. If I install the Admin client on an NT workstation, what else has to be done for it to work... be an authorized server?
13. What is multiplexing? What is multiple data streams? Are they the same?
14 .how can I recover an corrupted image?
15. How can we assign barcode rules?
16. What is OTM? TIR?
17. What format does NetBackup write the tape in?
18. How does NetBackup tie together with Media Manager?
19. How do I create a Storage Unit that will only be used by one client?
20. What is the difference between the expiration date for a volume in NetBackup's media catalog and Media Manager's volume database?
22. What is the difference between a frozen volume and a suspended volume?
23. How many Robot Control Hosts can a DLT tape library have?
24. What does the bpbkar process do? bpsched? bpbrm? bpdbm? ltid? What process controls a DLT tape library... a DLT tape drive? What is the AVRD process?
25. Why is the catalog the most important component of Netbackup?
26. What does status 59 mean in the activity monitor?
27. Installation process for NBU 5.x, 6.x?
28. what is AVR mode?
29. Why is a binary catalog more efficient than an ASCII catalog?
30. What are NBU daemons and how to process

Stumpr2's picture

This is a good thread and pertinent to NetBackup administrators.
I have been asked to supply questions to hiring managers several times throughout my career.

This is a pretty telling question about basic NetBackup
8. What is the difference between a Volume Group and a Volume Pool?
15. How can we assign barcode rules?

But remember. The answers are only good when a followup question is used to get to more depth. A person could memorize the simple answers to the questions but the proff is in the followups and how the person being interviewed reacts.

VERITAS ain't it the truth?

zippy's picture

 Group the swims in the Volume pool?

:)


rookie11's picture

to my surprise watever chandrasekhar posted only these r available on other websites as well........
anyways can anyone tell me answer for questions
14 .how can I recover an corrupted image?
17. What format does NetBackup write the tape in?
23. How many Robot Control Hosts can a DLT tape library have????????????????///

Hi all

please put questions related to NBU inteview from ur past experience or ur suggestion......................

I strongly feel BOB can help all the new netbackup admins through this discussion thread.

Stumpr2's picture

14. bpexpdate then bpimport
17. tar
23. one

See. Easy answers offer little insight, but followup questions on...
14. bpexpdate. when is bpexpdate -deassignempty run?
14. bpimport. Why are there two phases?
17. where is tar in NetBackup and what is it called?
23. how can you change the control host?

VERITAS ain't it the truth?

Amit Karia's picture

In All interviews i have faced of netbackup.. i found three more or less common questions

1) About RMAN.. backup.. what is backup sequence of rman backup

2) SQL Script.. in client..how to create?

3) How to install media server(with device configuration steps)

4) basic questions about vault and VTL

rookie11's picture

17. where is tar in NetBackup and what is it called?  ??? frankly speaking i hav no idea about this question can anyone help

Amit Karia's picture

Tar is format of tapes written by netbackup

go to host properties->master server->properties--Media  and there is option called allow media overwrite..

same can be found in bp.conf in ALLOW_MEDIA_OVERWRITE

Ashu Agarwal's picture

I got the option where you directing, but yet I have to know what funtion this option do ? What would be happened if I am going to un-check this option from the above listed location ? Just many times have been seeing this is called TAR during the restoration !

Andy Welburn's picture

Tape ARchive (or ARchiving) - an archiving program to write file to & extract files from an archive file known as a tarfile - commonly made to a tape drive but not restricted to that.

chandrasekhar's picture

Hi friends,

     I am preparing for Solaris & veritas net backup for UNIX. I am attending interviews, i got some questions and solutions. Now  I am having some faqs, plz give me solutions

1. If you have a SCSI attached robot and in device monitor you see the drives marked as AVR, what does that mean and how would you fix it?
2. If I asked you to tell me if a client has Netbackup on it just by using a telnet command what would you do?
3. If you wanted to know what IP address netbackup was using to perform backups what command would you run and where would you run it?
4. What is flash backup?
5. How is image stored in netbackup
6. If a media ID A04567 comes back and it is frozen, what are the steps to unfreeze it and move it back to scratch from the command line?
7. If you wanted to bypass netbackup commands and move a tape from slot 1 to drive 3 how would you do that?
8. What is the client version supported by NBU 6.x and 5.x masters
9. If your last catalog backup was two days ago and the master server crashed what would you have to do to bring your environment back up to present time?
10. How do you find a disk based image via the command line and then delete it?
11. How do you import an NBU image that has been written to a disk storage unit?
12. What are the critical catalogs or databases on a Media Server?
13. How would you tune NetBackup to increase backup performance?
In which location(path) the temp files located in Netbackup for Windows/Unix?
14.What is the process of importing images and why do we import images?
15.How to Importing and expiring images?
16.What does it mean by inventoring a robot?
17.What is SAN media server?
18. How to check tape is bad?
19. How to check the tape is already expired or not?
20. How to check volume pool?
21 Media has been already expired, How to find out?
22. How to check tape is in cap?
53. How to see log entries, how to create log directories?
24.SQL Script.. in client..how to create?
25. How to install media server(with device configuration steps)?
26.what is avr mode

27. There is a Tape library with 10 drives ...Can we able to create 2 Storage units.....?

28.There are 1000 Client machines , 999 machines are transferring datas in good speed but one client machine is taking too long to transfer a datas ..... That is ...backup should complete within 2 hours ..but after 12 hours and more ...the data transfer is still happening.... why?

Srikanth Gubbala's picture

one should have lot patience to answer; let me answer some by today night. :):):):):)

regards, Srikanth.

Akashnaik's picture

Hi All,

I am also studying netbackup 6.5 on windows platform recently i have attend one interview in IBM but m not able to crack this interview onlt thiz bcoz this was my first interview on netbackup and in our office we implemneted recenlty veritas netbackup for windows....pls suggest..how can i grow my self in Veritas Netbackup.??

Venkatesh K's picture

nice post

Thanks & Regards, Venki Dont forget to Vote for + if you think suggestion is good, and mark as solution if it has resolved your problem.

rishi rich's picture

I think this is an Linux question.If you are untaring some file and you are not giving proper command at that time you will face this problem.
I think it is nothing to do with these Netbackup questions.

Thank you

Rishi nandedkar

Baski's picture
1. If you have a SCSI attached robot and in device monitor you see the drives marked as AVR, what does that mean and how would you fix it?
2. If I asked you to tell me if a client has Netbackup on it just by using a telnet command what would you do?
ANS: Telnet command used to check the bpcd port is running on the client
Telnet < host name> bpcd /13782
3. If you wanted to know what IP address netbackup was using to perform backups what command would you run and where would you run it?
ANS: use bpclntcmd –pn from master server to the client.
      Bpcover –r < host name>
4. What is flash backup?
5. How is image stored in netbackup
6. If a media ID A04567 comes back and it is frozen, what are the steps to unfreeze it and move it back to scratch from the command line?
ANS: bpmedia –unfreez < Media ID> 
Through GUI , right click on the media to move to scratch volume pool
7. If you wanted to bypass netbackup commands and move a tape from slot 1 to drive 3 how would you do that?
ANS: robtest s1 d3
8. What is the client version supported by NBU 6.x and 5.x masters
ANS: The version support from 6.x to 4.5
9. If your last catalog backup was two days ago and the master server crashed what would you have to do to bring your environment back up to present time?
ANS: I am expecting some one answer to this question.
10. How do you find a disk based image via the command line and then delete it?
ANS: http://seer.entsupport.symantec.com/docs/279174.htm 
11. How do you import an NBU image that has been written to a disk storage unit?
12. What are the critical catalogs or databases on a Media Server?
13. How would you tune NetBackup to increase backup performance?
In which location(path) the temp files located in Netbackup for Windows/Unix?
14.What is the process of importing images and why do we import images?
ANS: There are two phases.
Phase I:  It builds the skeleton metadata
Phase II: It allows you to select which images to actually complete the import process.
15.How to Importing and expiring images?
16.What does it mean by inventoring a robot?
17.What is SAN media server?
18. How to check tape is bad?
19. How to check the tape is already expired or not?
20. How to check volume pool?
21 Media has been already expired, How to find out?
22. How to check tape is in cap?
53. How to see log entries, how to create log directories?
24.SQL Script.. in client..how to create?
ANS: Start> program> Backup, restore and archive> select DB’s and save. It will create .bch files
25. How to install media server(with device configuration steps)?
26.what is avr mode
27. There is a Tape library with 10 drives ...Can we able to create 2 Storage units.....?
ANS: As per my knowledge. N no. of storage units you can create. But mail criteria to create a storage unit is.
1: It should be same robot controller
2: It should be same library
3: It should be same media server connected
4: It should be same Density.
28.There are 1000 Client machines , 999 machines are transferring datas in good speed but one client machine is taking too long to transfer a datas ..... That is ...backup should complete within 2 hours ..but after 12 hours and more ...the data transfer is still happening.... why?
ANS: Please check the Network bandwidth. BPTM,bpbrm on both master and media server and bpbkar and bpcd logs on clients. I am appreciated if any one give more information on this.
 
chandrasekhar's picture

Hi frieinds,

   I am preparing for Solaris9 & veritas net backup for UNIX. I am attending interviews, i got some questions and solutions. Now  I am having some faqs, plz give me solutions .

1. What is errorcode 58 and trouble shooting?

2. What  is 99 errorcode and troubleshooting?

3. If ndmp backup faile how do troubleshooging?

4.. How to take catalog backup?

5. How fo restore catalog backup?

6. How can we assign barcode rules?

7. How to install media server(with device configuration steps)?

8. Basic questions about vault and VTL?

9. How to check the tape is already expired or not?

10. How to check volume pool?

11 Media has been already expired, How to find out?

12. How to check tape is in cap?

13. How to see log entries, how to create log directories?

14. How to check tape is bad?

Karthikeyan Sundaram's picture

All questions that you have asked is answered once you verify the docs provided by Symantec.. And also it will be more helpful for you to understand the concept.

http://seer.entsupport.symantec.com/docs/290282.htm

you can get all docs from the above site.. 

I know its very tough to study all these... If you dont like to do so, just search for your question and get the answer.... but i would recommend to study all these before going to interview...

Thanks, Karthikeyan Sundaram.

mohanchandra's picture

Hi Friends & chandra,

Please send questins along with answers.

-Mohan.

Omar Villa's picture

1. What is Multiplexing
2. What is Multiplestreaming
3. You have a policy with schedule running a 1 week frequency backups, running sundays, monday morning backup fail and you restart the job manualy, how many days will pass until the next weekly schedule job starts automaticly?

Omar Villa

Netbackup Expert

Twiter: @omarvillaNBU

Claudio Veronezi's picture

I think that the objective isn't break anyone,

I think the question should be "Where can U find the solution?"  not the proper solution,

example:  I'm having some oracle problem, what could it be? how can I find the error? which log?

unless u got someone like the Great ones here :)  that know everything about it.
I think that even symantec will fight for one of these person.

Expose your daily problems and ask for solutions.

GREAT topic..

Thanks

Claudio Veronezi Mendes
IT Manager at Lb2 Consultoria
Londrina - Pr - Brazil
 

SOLUTION
rjrumfelt's picture

Claudio is correct.

If I am interviewing someone, and have a list of questions, I'm certainly going to see how much NetBackup the person knows off the cuff - but what I'm most interested in is if I stump the interviewee on a question, I want to see how he/she will go about finding the answer. 

I've asked plenty of basic questions on this board, and people have been very helpful.  If someone I'm interviewing happened to mention this board, or at least teh Symantec support site, I would be somewhat impressed, because I know that person is not going to give up at the first sign of trouble.

Like someone has said before - you can memorize the answer to every single question posted here, and answer to all of the questions on the NBU certification exam, and if in the interview the person changed up the variables in a question, you might be stumped.  While the answers to these questions are great to know, its better to know the concepts behind them.

Andy Welburn's picture

.

***EDIT***
Correction. "Nice Answers!" (Claudio & rj)

sravanthipendyala's picture

I too need the answer for the above Questions....

rjrumfelt's picture

You have the admin guides readily available, you should seek out the answers, and by doing this research you will learn much more than the answers to these questions.

Jyothi Reddy's picture
•How to duplicate tapes?
•What is a catalog? And watcare should be taken in managing catalogs?
•What is multiplexing and multistreaming  with examples?
•What is high and low water mark?
•How to restore backup media’s from one master to other master server?
•If a catalog is corruped? How to restore?
•How to archive catalog or how to reduce catalog if catalog sixe is increased?
•How to use netbackupscripting for fine tuning?
•Basic parameters to create new policy?
•How is image stored in netbackup?
•If your last catalog backup was two days ago and the master server crashed what would you have to do to bring your environment back up to present time?
•There is a Tape library with 10 drives ...Can we able to create 2 Storage units.....?
akimencoj's picture

Hi, I want to know if its possible to have a Script to restore any data that was backup with NetBackup 7.5

The idea is to have something like a command script from a terminal or DOS  or similar that according to any parameter like date and name of file, the system can find the archive directly and restore to any destination directory.

Exist this ?  It´s possible to build it ? How can we do it ?

There is any command in Net Backup to do it and "automate" as we can ?

Nowadays we do it manually.

Regards, Juan

Zahid.Haseeb's picture

Sample Exam 250-370: Administration of Symantec NetBackup 7.0 for Windows

http://www.symantec.com/business/training/certification/path.jsp?pathID=sample_exam_250-370

Any comment will be appreciated. Mark as Solution if your query is resolved
__________________
Thanks in Advance
Zahid Haseeb

zahidhaseeb.wordpress.com

mrinal.sarkar6200's picture

Hi,

Realy a good one to all the NBU Admin...

All the possible interview question in one thread..fine.

If one can go and dig out every question he will have a pretty good knowledge.

I have one..

Does it possible to do multiplexing on tape backup , when the tape librery(with 4 drive) is attached with Storage Filer.

Thanks.

Certified Symantec Professional.

Work mostly with Netbackup, Backup Exec, Storage Foundation, DLO and System Recovery

Mrinal Sarkar

Howrah, India

________________________

Shaheed's picture

Hi  

Please send  all basic net backup questions n answer at shaheed4net@gmail.com

Regards

Shaheed.

ram619's picture

Shaheed..Try to find the answer's on your own..So that you will get more questions on your mind :)

Ram

Veritas Netbackup 7.0.1, with WIN 2K3 platform.

Dan Giberson's picture

Really good thread everyone....i'm still a basic NBU user and could only answer a handful of the questions here. Half of the questions I would never have thought of. The one trend that I have noticed on this forum is that most people are runing NBU in a Linux / AIX environment as opposed to Windows, whereas I am a Windows shop so I have to "translate" answers in Windows. Might be time to convert my NBU to Linux.

NBU 7.01 on Windows 2003 with LTO2 Library

Andy Welburn's picture

Half of the questions I would never have thought of..."

There's no shame in that - no-one knows everything - it's a constant learning curve whatever your experience.

I still think the best "answers" to this thread were provided by Claudio  and rj:

https://www-secure.symantec.com/connect/forums/net...

https://www-secure.symantec.com/connect/forums/net...

Ashu Agarwal's picture

I don`t think to consider more on the subject of command line has for WINDOWS & LINUX Platform are very close to same in somepart of, as far as I have knowledge yet. Can someone please correct me if am stating erroneous somewhere in this ?

Thanks you !

Ashu

Marianne's picture

In all honesy - there are some questions that I don't understand and a lot that can only be answered after asking for more info....

Supporting Storage Foundation and VCS on Unix and Windows as well as NetBackup on Unix and Windows
Handy NBU Links

Ashu Agarwal's picture

3/17/2011 5:08:47 PM - requesting resource wipbkp01-hcart-robot-tld-2-wipnas1

3/17/2011 5:08:47 PM - requesting resource wipbkp01.NBU_CLIENT.MAXJOBS.wipnas1

3/17/2011 5:08:47 PM - requesting resource wipbkp01.NBU_POLICY.MAXJOBS.WNS_PNQ_NAS_Vol3

3/17/2011 5:08:48 PM - granted resource wipbkp01.NBU_CLIENT.MAXJOBS.wipnas1

3/17/2011 5:08:48 PM - granted resource wipbkp01.NBU_POLICY.MAXJOBS.WNS_PNQ_NAS_Vol3

3/17/2011 5:08:48 PM - granted resource 1626L3

3/17/2011 5:08:48 PM - granted resource IBM.ULTRIUM-TD4.001

3/17/2011 5:08:48 PM - granted resource wipbkp01-hcart-robot-tld-2-wipnas1

3/17/2011 5:08:48 PM - estimated 0 kbytes needed

3/17/2011 5:08:49 PM - started process bpbrm (7368)

3/17/2011 5:08:50 PM - connecting

3/17/2011 5:08:50 PM - connected; connect time: 00:00:00

3/17/2011 5:08:54 PM - mounting 1626L3

3/17/2011 5:10:05 PM - mounted; mount time: 00:01:11

3/17/2011 5:10:06 PM - positioning 1626L3 to file 11

3/17/2011 5:12:01 PM - positioned 1626L3; position time: 00:01:55

3/17/2011 5:12:01 PM - begin writing

3/17/2011 9:11:02 PM - current media 1626L3 complete, requesting next resource Any

3/17/2011 9:11:05 PM - current media -- complete, awaiting next media Any Reason: Drives are in use, Media Server: wipbkp01,

                 Robot Number: 2, Robot Type: TLD, Media ID: N/A, Drive Name: N/A,

                 Volume Pool: NAS_PNQ_Sat2, Storage Unit: wipbkp01-hcart-robot-tld-2-wipnas1, Drive Scan Host: N/A

3/17/2011 9:12:26 PM - Error bptm(pid=5168) NBJM returned an extended error status: drive(s) unavailable or down (830) 

3/17/2011 9:12:29 PM - end writing; write time: 04:00:28

3/17/2011 9:12:35 PM - Error ndmpagent(pid=4440) Connection was closed but has not yet been destroyed.   

3/17/2011 9:12:35 PM - Error ndmpagent(pid=4440) Connection was closed but has not yet been destroyed.   

extended error status has been encountered, check logs(252)

3/17/2011 9:12:35 PM - Error ndmpagent(pid=4440) MoverGetState called with no session        

3/17/2011 9:12:36 PM - Error ndmpagent(pid=4440) NDMP backup failed, path = /vol/WINDADD2      

3/17/2011 9:12:36 PM - Error ndmpagent(pid=4440) Connection was closed but has not yet been destroyed.   

3/17/2011 9:12:36 PM - Error ndmpagent(pid=4440) Connection was closed but has not yet been destroyed.   

3/17/2011 9:12:36 PM - Error ndmpagent(pid=4440) Connection was closed but has not yet been destroyed.   

3/17/2011 9:12:37 PM - Error ndmpagent(pid=4440) Connection was closed but has not yet been destroyed.   

3/17/2011 9:12:37 PM - Error ndmpagent(pid=4440) MoverGetState called with no session       

3/17/2011 9:12:37 PM - Error ndmpagent(pid=4440) Connection was closed but has not yet been destroyed.   

3/17/2011 9:12:37 PM - Error ndmpagent(pid=4440) Connection was closed but has not yet been destroyed.   

3/18/2011 11:17:33 AM - job 99467 was restarted as job 99499

3/18/2011 11:19:01 AM - job 99467 was restarted as job 99501