Synthetic Full Backup Requires Tape

Last post 01-28-2019, 4:47 PM by Wwong. 6 replies.
Sort Posts: Previous Next
  • Synthetic Full Backup Requires Tape
    Posted: 01-09-2019, 4:46 AM

    Hi.

    Any reason why a Synthetic Full backup to disk will request a tape to continue with the backup?

     

    Thanks.

    Ignes

  • Re: Synthetic Full Backup Requires Tape
    Posted: 01-09-2019, 6:08 AM

    Hi Ignes 

    The only time I have seen an issue like this is when a required Index is on Tape, and during the Synthetic Full it requires that Index. 

    Can you please confirm whether that is the case here?

    Thank you 

    Winston

  • Re: Synthetic Full Backup Requires Tape
    Posted: 01-22-2019, 3:58 AM

    Hi Winston.

    I don't see anything in the job saying that that the tapes are required for the Index Restore although lots of tapes are required.

     

    Would this be skipped if a full backup was run to disk then attempt to run a Synthetic Full?

     Also what is happening during the "Preparation" phase during Synthetic backups. I have a couple of clients that sits on this phase for hours then starts to progress.

    Appreciated.

    Ignes

  • Re: Synthetic Full Backup Requires Tape
    Posted: 01-22-2019, 3:43 PM

    Hi Ignes

    This does sound like a weird behavior.

    I would recommend to open a Support Ticket to determine why this is occurring, at the meantime you can try running a Traditional Full.

    Thank you 

    Winston 

  • Re: Synthetic Full Backup Requires Tape
    Posted: 01-23-2019, 8:18 AM

    In case in helps you, this happened to me when my disk storage policy retention was set to 0 cycles and X 60 days. My understanding was eventaully the full's that existed on disk were aged, and the fulls only existed on tapes.  When the next full tried to run it required a tape.  If I had at least 1 cycle set, it wouldn't have aged the full off disk until another full was also on disk.  (I may be wrong in my description, so feel free to correct me if I am)

    Just throwing it out there!

  • Re: Synthetic Full Backup Requires Tape
    Posted: 01-28-2019, 8:26 AM

    Appears that this was due to Index restores being required.

    Seperate jobs started for the Index restores.

    Still not sure regarding the Syn Full preparation phase as the times vary on several subclients.

    Will monitor for this week and if there is no improvement I will log a call with support.

     

    Thanks.

  • Re: Synthetic Full Backup Requires Tape
    Posted: 01-28-2019, 4:47 PM

    Hi Ignes

    Thanks for sharing the findings

    It does sound like a similar event to what username2349023 is describing, where Index Recon is running to rebuild the Index Cache. 

    Just wondering what is the Index Cache configuration on each of the MediaAgent (involved in backing up the data). This can be found in properties of MA -> Catalog. 

    If you can share a screenshot of your Index that would be great. Additionally the Storage Policy (showing all the copies) and the retention. 

    The above will help to understand whether the Index Cache retention is long enough. 

    Thank you 

    Winston 

The content of the forums, threads and posts reflects the thoughts and opinions of each author, and does not represent the thoughts, opinions, plans or strategies of Commvault Systems, Inc. ("Commvault") and Commvault undertakes no obligation to update, correct or modify any statements made in this forum. Any and all third party links, statements, comments, or feedback posted to, or otherwise provided by this forum, thread or post are not affiliated with, nor endorsed by, Commvault.
Commvault, Commvault and logo, the “CV” logo, Commvault Systems, Solving Forward, SIM, Singular Information Management, Simpana, Commvault Galaxy, Unified Data Management, QiNetix, Quick Recovery, QR, CommNet, GridStor, Vault Tracker, InnerVault, QuickSnap, QSnap, Recovery Director, CommServe, CommCell, SnapProtect, ROMS, and CommValue, are trademarks or registered trademarks of Commvault Systems, Inc. All other third party brands, products, service names, trademarks, or registered service marks are the property of and used to identify the products or services of their respective owners. All specifications are subject to change without notice.
Close
Copyright © 2019 Commvault | All Rights Reserved. | Legal | Privacy Policy