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Question

DR Restoration from Tape Library

  • January 15, 2026
  • 1 reply
  • 27 views
K
Novice
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Disaster Recovery Query – IDM Application Backup Tapes (December & November 2025)

  • The IDM application is hosted in DC1 (Onsite).
  • Monthly full backups are taken every last Sunday of the month.
  • These backups are sent to DC2 (DR Site).
  • In December 2025, the IDM application required 5 tapes for the full backup.
  • Out of these, 3 tapes became full and were already moved to DC2.
  • The remaining 2 tapes were not yet full and stayed onsite in DC1.
  • A disaster has now wiped out all onsite data, including incrementals, disk backups, and the 2 onsite tapes.
  • We need to know in how many possible ways the application can be recovered using the offsite tapes.
  • If recovery from December 2025 is not possible due to missing tapes, we need confirmation whether all November 2025 backup tapes for IDM are available offsite.
  • If November’s set is complete, recovery should proceed from that month instead.

    1 reply

    S
    Vaulter
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    Hi ​@Kent Low ,

    Good day!

    If a full backup is written across five tapes and two of those tapes are erased or unavailable, the data from that backup set will not be recoverable. All tapes that belong to a full backup are required to successfully perform a full recovery.

    To avoid such situations, it is strongly recommended that once a full backup is completed, all associated tapes (including partially filled tapes) are sent offsite as part of the same backup set.

    In the current scenario, as you have mentioned, recovery from the December backup is not possible due to missing tapes. Therefore, recovering from the November backup is the only available option, provided the complete November tape set is available offsite.

    Regards,

    Sureshkumar S

     

     

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