Forum Discussion

robertoaxity's avatar
robertoaxity
Moderator
2 years ago

Question about Images on Disk

Hello  guys, I have a doubt if this is normal or if the images on disk are being copied twice. Example, in my productive disk pool if I filter the images by catalog in the netbackup console, it a...
  • davidmoline's avatar
    davidmoline
    2 years ago

    Hi robertoaxity 

    Without knowing more about the environment and how you process backups this is most likely fine. Some background to explain:

    1. In NetBackup you can have multiple copies of backups - each copy is assigned a copy number. 
    2. With the use of SLP's (and manual duplication) each copy may have a different retention setting.
    3. The primary copy is typically copy 1, but if this copy expires, then another copy will become the primary copy (eg copy 2). The primary copy can also be assigned to an arbitary copy number. 
    4. The primary copy is used by default for restores (on the command line you can change which copy you restore frrom, in the GUI the copy used will be the primary copy).

    So the count of primary copies may not equal the count of copy 1. There is no reason why it needs to be the same.

    Cheers
    David

davidmoline's avatar
davidmoline
Level 6
2 years ago

Hi robertoaxity 

Without knowing more about the environment and how you process backups this is most likely fine. Some background to explain:

  1. In NetBackup you can have multiple copies of backups - each copy is assigned a copy number. 
  2. With the use of SLP's (and manual duplication) each copy may have a different retention setting.
  3. The primary copy is typically copy 1, but if this copy expires, then another copy will become the primary copy (eg copy 2). The primary copy can also be assigned to an arbitary copy number. 
  4. The primary copy is used by default for restores (on the command line you can change which copy you restore frrom, in the GUI the copy used will be the primary copy).

So the count of primary copies may not equal the count of copy 1. There is no reason why it needs to be the same.

Cheers
David