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kkhoo's avatar
kkhoo
Level 5
5 years ago

media is not fully used and backup keeps using tape in scratch pool.

Hi,

I keep run out of tapes for backup.

Some backup continue to use tape from scratch pool even it has not fully consumed the tape.

Please advise, thanks.

 

 

8.1.2
Linux
  • mph999's avatar
    mph999
    5 years ago

    Media sharing is good, as all media servers can use the same media.  The effect of not using it, is that you probably end up needing more tapes

    You want to avoid 'multiple retentions per media' that over time with tie media up and you will use many times more media than you need.

  • Marianne's avatar
    Marianne
    5 years ago

    Media sharing will help, but will certainly not resolve your problem 100%. 

    With media sharing, other media servers will be able to append to a tape if all other criteria is a match: pool, robot rumber, retention.
    Bear in mind that only one media server can use a piece of media at any given time.

    You can read up about advantages of media sharing in Admin Guide I.
    Please read up about 'unrestricted media sharing' and 'sharing groups' before you decide to enable media sharing. 
    Make sure that you understand how to use 'Maximum Partially Full' setting in Volume Pools (also covered in Admin Guide I).

    I still think that you have way too many pools and not enough scratch tapes. 

10 Replies

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  • RiaanBadenhorst's avatar
    RiaanBadenhorst
    Level 6
    5 years ago

    Does the tape say its full or not? Just because it's not used "all" the space the tape is designed to have doesn't mean its not full. A tape might be rated to take 2TB but you'll only fit 1.5TB on it due to the compression of the data.

    • kkhoo's avatar
      kkhoo
      Level 5
      5 years ago
      Hi RiaanBadenhorst, thanks for your reply. Here is the screenshot, F40135 F40135L4 Active HCART 11.12.2020 05:01:02 12.12.2017 05:01:02 TLD 0 F40120 F40120L4 Active HCART 18.08.2022 05:00:08 18.04.2018 05:01:02 TLD 0 F40094 F40094L4 Active HCART 16.04.2021 05:01:03 30.12.2016 05:00:06 TLD 0 F40082 F40082L4 Active HCART 08.01.2020 05:00:06 30.12.2016 05:00:08 TLD 0 F40069 F40069L4 Active HCART 07.03.2021 05:01:03 24.01.2018 05:01:03 TLD 0 F40036 F40036L4 Full HCART 11.12.2020 05:01:02 13.06.2016 05:00:01 TLD 0 F40030 F40030L4 Active HCART 07.01.2020 05:00:12 07.01.2017 05:00:12 TLD 0 F40018 F40018L4 Active HCART 16.02.2020 05:00:04 29.12.2016 05:00:03 TLD 0
      • Marianne's avatar
        Marianne
        Level 6
        5 years ago

        kkhoo 

        What output/screenshot is this?

        I have tried to make sense of the output by inserting some <CR>, but there are no headings:

        F40135 F40135L4 Active HCART 11.12.2020 05:01:02 12.12.2017 05:01:02 TLD 0
        F40120 F40120L4 Active HCART 18.08.2022 05:00:08 18.04.2018 05:01:02 TLD 0
        F40094 F40094L4 Active HCART 16.04.2021 05:01:03 30.12.2016 05:00:06 TLD 0
        F40082 F40082L4 Active HCART 08.01.2020 05:00:06 30.12.2016 05:00:08 TLD 0
        F40069 F40069L4 Active HCART 07.03.2021 05:01:03 24.01.2018 05:01:03 TLD 0
        F40036 F40036L4 Full HCART 11.12.2020 05:01:02 13.06.2016 05:00:01 TLD 0
        F40030 F40030L4 Active HCART 07.01.2020 05:00:12 07.01.2017 05:00:12 TLD 0
        F40018 F40018L4 Active HCART 16.02.2020 05:00:04 29.12.2016 05:00:03 TLD 0

        Can you perhaps run 'available_media' and save to a .txt file and upload it? 
        e.g. /usr/openv/netbackup/bin/goodies/available_media >/tmp/media.txt