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DPM tape protection verification RRS feed

  • Question

  • Hi ,

    I am new to DPM and need to clarify some issues that doubt for me .

    • if i do long term backup to tape , is that DPM perform full backup ? or is it possible to perform incremental +full backcup for long term backup to tape.
    • if i use single tape using tape co location feature , all protection groups will be able to use the same tape assuming that all protection group has same retention period. in this situation ,  once the tape full only we can see "ready for offsite " message. what does this really mean ? cant i change to next tape until existing tap is full?
    • if i have multiple protection groups and if i dont enable tape co location , is that mean i have to have multiple tapes for each protection group ?

     

    I was using backupExec and shifted to DPM .tape allocation is bit confused me. i want to do daily incremental backup to a single tape and weekly full backup.I have tape library with LTO 4 .single tape is enough for me to put my all data backup. so i dont want allocate multipe tapes . every month i send one tape for offsite for archival purpose. i have NAS which i can use for disk base backup. require litte bit of clarity of how to perform above secnario with DPM long term tape  backup.

    Friday, July 30, 2010 7:45 AM

Answers

  • Hi Paka,

    [quote]

    When you enable tape colocation facility ,mulitiple PG can backup to same tape assuming all PG has same retention range. correct me if i am wrong in that statement.

    [/quote]

    TRUE!

    [QUOTE2]

    can't i change the to another tape till it says "ready for offsite"

    [/QUOTE2]

    False, offcourse you can change tapes if you want to. ready for offsite means that DPM is "done" with a tape and a backup is on it.

     

    Wednesday, August 4, 2010 11:58 AM

All replies

  • Hi Paka,

    lets see if i can help you with your questions.

    - when you use long term backup to disk, DPM only does a full backup. however you can use short term protection to tape with a daily frequency and then you will have the option to do only fiull backups or to do full and incremental backups.

    - not quite sure what you mean here, can you clarify? offsite ready means that a backup is stored on the tape and you need to remove and store it. once the dataset on it expires it will be marked as "overdue" which means you can reuse the tape.

    - yep, without co location a tape is needed for every PG

    yould should take a look at the disk based protection DPM offers, really aewsone stuff and even nicer if you can combine it with tape based protection.

    hope this helps, let us know if you have more questions,

    Alex

    Friday, July 30, 2010 9:40 AM
  • Hi Alex ,

    Really appreciate your feedback. i'll try to illustrate this way. When you enable tape colocation facility ,mulitiple PG can backup to same tape assuming all PG has same retention range. correct me if i am wrong in that statement.

    Other thing is ,when i enable tape colocation facility , what i red in MS articles saying tape will be marked as "Ready for Offsite" after tape full. is that mean , can't i change the to another tape till it says "ready for offsite" ( Imagine a situation where i perform daily full backup (Long term protection) to tape and i want to use different tapes daily .In this situation , can i put new tape every day daily to perform full backup without seeing "Ready for offsite " green color tick.

    I hope my question clear better this time. appreciate your feed back..

    Wednesday, August 4, 2010 12:34 AM
  • Hi Paka,

    [quote]

    When you enable tape colocation facility ,mulitiple PG can backup to same tape assuming all PG has same retention range. correct me if i am wrong in that statement.

    [/quote]

    TRUE!

    [QUOTE2]

    can't i change the to another tape till it says "ready for offsite"

    [/QUOTE2]

    False, offcourse you can change tapes if you want to. ready for offsite means that DPM is "done" with a tape and a backup is on it.

     

    Wednesday, August 4, 2010 11:58 AM
  • One can change the tape any time one wishes. Its not mandatory that tapes may only be changed once they have offsite ready icon set to green. what the offsite icon ready implies is that the tape is full and no more backups will be made on it till the existing ones expire. 

     

    thanks,

    Parag

    This posting is provided "AS IS" with no warranties, and confers no rights.

    Friday, August 6, 2010 10:14 AM
    Moderator