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Sharon_E's avatar
Sharon_E
Level 3
12 years ago
Solved

differential backup device type

Hi

I want to make a weekly differential  backup
I defined 1 Mediapool Overwrite Protection Time 1 Week, Append Time 4 Days

&

first  Job with Options set to Full Backup and Overwrite on weekend
2nd Job with Options set to Differential and Append

I do not know whether to create only 1 backup device for the 2 jobs , or create 2 backup device one to each of the two job

regards

Sharon

12.x and Earlier
Backup and Recovery
Backup Exec
Configuring
Windows Server (2003-2008)
  • pkh's avatar
    pkh
    12 years ago
    It is up to you whether you want to use 1 or 2 disk storage. If your retention period for both the full and differential backups are the same then you only need one media set. For disk storage, you should always specify Overwrite. There is no advantage in appending to disk media

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  • RahulG's avatar
    RahulG
    Level 6
    12 years ago

    You don't really need to create two devices as such , what you need to do is create two media set.

    Refer https://www-secure.symantec.com/connect/blogs/faq-how-configure-media-setsb2d-jobs-and-backup-exec-proper-management-disk-space-while-using-

  • Sharon_E's avatar
    Sharon_E
    Level 3
    12 years ago

    Hi

    in the link you attached

    it seems to be no reference to differential back up

    and seems to refer only to full back up jobs

    I guess it makes sense also to differinteial backup

      and 1 backup device can hold full backup & differinteial backup  at the same time

    but need to be sure

    regards

    Sharon

  • RahulG's avatar
    RahulG
    Level 6
    12 years ago

    Yes ,One backup device can hold both full and differential backups at the same time. The Link referred will just give better understanding , in your case it is more of media set configuration .

  • pkh's avatar
    pkh
    Moderator
    12 years ago
    It is up to you whether you want to use 1 or 2 disk storage. If your retention period for both the full and differential backups are the same then you only need one media set. For disk storage, you should always specify Overwrite. There is no advantage in appending to disk media
  • Sharon_E's avatar
    Sharon_E
    Level 3
    12 years ago

    Ok so one backup device


    If I want differential backup 6 days a week and on Friday a full backup

    I'm not sure how configure the media set

    do I need in the media set settings -  overwrite protecion for 6 days and append for 6 days

     

    regards

    Sharon

  • pkh's avatar
    pkh
    Moderator
    12 years ago
    Your OPP is fine if you just to retain your backups for 1 week. Set your AP to 1 hour, the minimum. You don't need it
  • Sharon_E's avatar
    Sharon_E
    Level 3
    12 years ago

    I realized that that the append period is the time tjat its possible add data media

    Append period is the amount of time specified in hours, days, weeks, or years, that data may be added (appended) to media

    http://www.symantec.com/business/support/index?page=content&id=TECH5459

    so if I set to 1 hour I'll not able to add data to the media after 1 hour

  • pkh's avatar
    pkh
    Moderator
    12 years ago
    Yes. You would not be able to append to the media after 1 hour. This does not mean that your job will fail. BE will either overwrite a recyclable media or create new ones in the disk storage What version of BE are you using and what kind of disks are you using?