This article provides solution to the upgrade problem for QFX5K series devices where the image installation fails with the post-install fail message.

Following error seen while running the command "request system software add <image>"

POST-INSTALL...

Saving the config files ...

NOTICE: uncommitted changes have been saved in /var/db/config/juniper.conf.pre-install

Copying jpuppet pkg to /var/sw/pkg

Copying chef pkg to /var/sw/pkg

Pushing installation package to host...

rcp: /var/run/./vjunos-install.sh: Read-only file system

download_file /var/tmp/preinstall/vjunos-install.sh failed, ret=1

WARNING: A REBOOT IS REQUIRED TO LOAD THIS SOFTWARE CORRECTLY. Use the

WARNING: 'request system reboot' command when software installation is

WARNING: complete. To abort the installation, do not reboot your system,

WARNING: instead use the 'request system software delete jinstall'

WARNING: command as soon as this operation completes.

ERROR: jinstall-vjunos fails post-install

ERROR: jinstall-vjunos-20.4R3-S2.6-signed fails post-install

or

Verified jinstall-vjunos-21.2X4.1.tgz signed by PackageProductionSHA1RSA_2023 method RSA2048+SHA1

Adding vjunos...

Saving contents of boot area prior to installation

tar: ./pxeboot: Read error at byte 198144, reading 10240 bytes: Input/output error

tar: ./modules/if_vtnet.ko: Read error at byte 95744, reading 10240 bytes: Input/output error

tar: ./cdboot: Read error at byte 0, reading 9216 bytes: Input/output error

tar: ./kgzldr.o: Read error at byte 0, reading 5820 bytes: Input/output error

tar: Error exit delayed from previous errors

WARNING:  This package will load JUNOS 21.2X4.1 software.

WARNING:  It will save JUNOS configuration files, and SSH keys

WARNING:  (if configured), but erase all other files and information

WARNING:  stored on this machine. It will attempt to preserve dumps

WARNING:  and log files, but this can not be guaranteed. This is the

WARNING:  pre-installation stage and all the software is loaded when

WARNING:  you reboot the system.

 POST-INSTALL...

Saving the config files ...

NOTICE: uncommitted changes have been saved in /var/db/config/juniper.conf.pre-install

Pushing installation package to host...

rcp: /var/run/./vjunos-install.sh: Read-only file system

download_file /var/tmp/preinstall/vjunos-install.sh failed, ret=1

WARNING:  A REBOOT IS REQUIRED TO LOAD THIS SOFTWARE CORRECTLY. Use the

WARNING:  'request system reboot' command when software installation is

WARNING:  complete. To abort the installation, do not reboot your system,

WARNING:  instead use the 'request system software delete jinstall'

WARNING:  command as soon as this operation completes.

ERROR: jinstall-vjunos fails post-install

ERROR: jinstall-vjunos-21.2X4.1-signed fails post-install



1. If there are no Input/Output errors seen while adding the image and only post-install fail message is seen then try to re-add the image with the "request system software add <image>" command.
2. However if the device has post-install fail along with the I/O errors then we have to check for the DMA-WRITE errors in the host.
3. The device needs to be power cycled to clear the DMA errors and then we can proceed with the upgrade of the device.