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MX204 /dev/oam not available anymore after 21.4 upgrade

  • 1.  MX204 /dev/oam not available anymore after 21.4 upgrade

    Posted 03-13-2023 08:11
    Edited by Jodi Meier 03-16-2023 18:50

    Hello all,

    I just upgraded two MX204 from 20.4R3.8 to 21.4R3-S2.3 (with a step 21.2R3-S4.8).

    First, I was not able anymore to create a system recovery snapshot :

    admin> request system snapshot recovery 
    OAM volume is too small: doing minimal recovery snapshot
    Creating image ...
    Compressing image ...
    Image size is 876MB
    ERROR: The OAM volume is too small to store a snapshot

    I read this KB article : KB33892
    It didn't help, I did not find any old package to remove.

    Issue is impacting both upgraded MX204, and appeared between 21.2 and 21.4 upgrade (request recovery snapshot worked well in 21.2R3).

    Saw this as well : PR1639991.

    Bug should be resolved in 21.4, I tried to apply workaround by working with mount/unmount oam without success.

    Then I tried request system recover oam-volume, which failed :

    admin> request system recover oam-volume 
    NOTICE: Recovering the OAM volume ...
    gpart: autofill: No space left on device
    newfs: /dev/gpt/oam: could not find special device
    mount: /dev/gpt/oam: No such file or directory
    umount: /oam: not a file system root directory
    vtbd0p2 deleted
    Verified oam-ve signed by PackageProductionECP256_2022 method ECDSA256+SHA256
    NOTICE: Creating a recovery snapshot on the OAM volume ...
    OAM volume is too small: doing minimal recovery snapshot
    Creating image ...
    Compressing image ...
    Image size is 876MB
    mount: /dev/gpt/oam: No such file or directory
    ERROR: Cannot mount OAM volume
    ERROR: oam recovery error: snapshot creation failure

    And now I can't even mount or unmount oam :


    root@:/var/home/xxx # mount /dev/gpt/oam /oam

    mount: /dev/gpt/oam: No such file or directory

    Then, when I read this article below, I wonder if oam partition should be available anyway, cause MX204 is NG-RE :

    CEC Juniper Community

    Juniper remove preview
    CEC Juniper Community
    View this on Juniper >

    But then, why was I able to request system snapshot recover before upgrading to 21.4 ?

    Is anybody have some clues about this ?



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