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  • 1.  QFX 5120 Patching: Failed add no space left on device

    This message was posted by a user wishing to remain anonymous
    Posted 05-25-2026 07:23
    This message was posted by a user wishing to remain anonymous

    I am having issues patching our QFX 5120's from 24.4R2-S2.6 to 24.4R2-S3.6. I have 4 devices that installed fine all 48T models. And 4 devices that failed add no space left on device 32C and 48Y models. request system storage cleanup is not cleaning up this issue. I have ran the installation multiple different ways, no-copy no-validate  unlink force-host etc. no luck. The file size is 1625mb which is concurrent with the file size that has been released in the past. In fact the current version installed on these switches is 1624mb. We have logged into the shell and looked for large files that could be causing this and have not been able to find or pinpoint anything that should not be there. Any suggestions or advice is appreciated. Thanks.

    Failed install log

    image
    System Storage
    image


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  • 2.  RE: QFX 5120 Patching: Failed add no space left on device

    Posted 05-26-2026 05:59

    The «no space left» happens when pushing the file to the hypervisor, not within the JunOS Virtual Machine.

    So you have to look inside the hypervisor and check manually.

    start shell user root
    hshell

    Then check where there's something wrong...

    Here is a working QFX5120 from inside the hypervisor (and of course you want to look at /var/log and /var/tmp).

    # df -h
    Filesystem                       Size  Used Avail Use% Mounted on
    rootfs                           1.9G  544M  1.3G  31% /
    none                             7.4G   12K  7.4G   1% /dev
    tmpfs                            7.4G  312K  7.4G   1% /run
    /dev/sda4                        1.9G  544M  1.3G  31% /
    /dev/sda5                         20G  1.5G   17G   8% /var
    tmpfs                            7.4G     0  7.4G   0% /var/volatile
    /dev/sda2                        977M  494M  483M  51% /boot
    /dev/sda1                        190M   18M  173M  10% /boot/efi
    /dev/mapper/vg0_vjunos-lv_junos   21G  9.7G  9.5G  51% /junos
    cgroup                           7.4G     0  7.4G   0% /sys/fs/cgroup
    none                              21G  9.7G  9.5G  51% /junos/images/lxc/dcpfe0

    17GB are available in the linux host /var



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    Olivier Benghozi
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  • 3.  RE: QFX 5120 Patching: Failed add no space left on device

    Posted 05-27-2026 00:40

    Execute "request app-engine cleanup" as a "root" and try the upgrade again.
    This command will clean /var/tmp and /var/log on the VM Host.

    Regards,
    Wojciech

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