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symanuser's avatar
symanuser
Level 4
10 years ago

How to re-store old LTO2 and LTO3 backup content into new LTO6 tapes?

HI all,

We want to re-store our old backups in LTO2 tapes into new LTO6 tapes. Most of the backups are filesystem levels backups and some are agnet based application level backups (i.e MS SQL and MS Exchange) taken using Symantec Netbackup.

So, what mechanisms are available for us to re-store the old LTO2 backup content into new new LTO6 tapes so that we can scrap old LTO2 and LTO3 tapes.

Assume that we have tape libraries (two) which are capable of reading LTO2 &3 tapes and writing into LTO6 tapes. Also, we already have a shared (common) storage pool, if needed.


Many thanks
 

  • LTO-6 drives are not compatible with LTO-2 and LTO-3, so you need to duplicate backup images in old tapes to LTO-6 before in NetBackup domain that have both LTO-2&3 compatible drives and LTO-6 drives.

    Then, if you will keep these images in this domain, just promote new image copies as primary copy. Otherwise, if you need to move new tapes to other NetBackup domain, move and import them in new domain.

5 Replies

  • Just want to add a quick note...

    We currently have two media servers as well. One running NetBackup 7.1 and the other running Netbackup latest. Of course, LTO2&3 libraries are connected to media server running NetBackp 7.1 and LTO6 tape library to Netbackup 7.6 media server.

  • LTO-6 drives are not compatible with LTO-2 and LTO-3, so you need to duplicate backup images in old tapes to LTO-6 before in NetBackup domain that have both LTO-2&3 compatible drives and LTO-6 drives.

    Then, if you will keep these images in this domain, just promote new image copies as primary copy. Otherwise, if you need to move new tapes to other NetBackup domain, move and import them in new domain.

  • Yasuhisa is right - you will need to duplicate.

    Because the drives/robots are connected to different media servers, the duplication will go across the network and will be s-l-o-w...

    So, identify the list of LTO2/3 tapes that need to be duplicated (Media List report or bpmedialist) then use the GUI (Catalog -> Duplicate) or cmd (bpduplicate).

    If you use cmd, specify a start date going back far enough:

    -s mm/dd/yyyy

    e.g. -s 01/01/2010 should pick up all images on that tape done since 1 Jan 2010.

    bpduplicate -id <media_id> -d <start-date> -dstunit <dest_stunit> -dp <dest_volume_pool>

    Similar recent posts:

    Script to duplicate old tapes 

    Moving/copying images from LTO3 tapes to LTO5 tapes 

    Migrate Tape Library 

     

  • Hi all,

    Could you kindly explain little more on the "duplication" process that you're talking about?

    What we want to achieve is that move the old backup content (file system backups as well as application level backups) that is currently in LTO2 and LTO3 tapes, into new LTO6 tapes.


    We have an old tape library that can do read and write to LTO2 and LTO3 tapes. Also we have a new tape library that uses LTO6 tapes.

    Though we have two media servers, it may possible to connect both tape libraries into one media server. (essentially, within the transition period, we would connect the new tape library into the existing media server running Netbackup 7.1, along with the old tape libraary. Once the data migration is done, we can update Netbackup into version 7.6)

    If so, how this data migration can be achived?


    Basically, I am looking for answers on two possbile options;

    Option 01 : Two media servers running NetBackup 7.1 & 7.6 and old tape library is connected to "old" media server and the new tape library is connected to the "new" media server.

    Option 02 : Both "old" & "new" tape libraries are connected to the "old" media server running NetBackup 7.1 during the data migration period. Once the migration is finished, we need to update NetBackup version to the latest (as of now 7,6).


    I sincerely hope, my question is clear to you all and I am waiting for your valuable ideas and thoughts on this data migration options.



    Thank you in advanced.

     

  • Both options  will work, but both tape libraries connected to one media server may be faster than copying data over the network between media servers.

    If you decide to connect both libraries to same media server, you need to verify that this media server has sufficient physical resources - hba's, cpu, memory.

    Duplication is a process whereby the source media is mounted on the media server that wrote the backup, data is read and sent to the destination storage unit that you specify (similar to a restore) and the destination storage unit write the data to tapes in the pool that you specify (similar to a backup). 

    One thing that you need to bear in mind: if connect both libraries to the same media server, the new tapes will owned by the old media server and you will have to change ownership to new media server when you connect new library to new media server, using bpmedia command.

    Duplication is described in NBU Admin Guide I.