When trying to upgrade from Junos OS version 12.1X46-D10 to a subsequent release of 12.1X46 (i.e. 12.1X46-D25), the upgrade fails due to a lack of disk space on SRX5k RE-13-20.
Sample output of a device running Junos 12.1X46-D20. The goal is to upgrade to 12.1X46-D25, but the installation fails with a "low on free disk space" error.
root> ... add no-copy /var/tmp/junos-srx5000-12.1X46-D25.7-domestic.tgz
NOTICE: Validating configuration against junos-srx5000-12.1X46-D25.7-domestic.tgz.
NOTICE: Use the 'no-validate' option to skip this if desired.
Checking compatibility with configuration
Initializing...
Verified manifest signed by PackageProduction_12_1_0
Verified junos-12.1X46-D20.5-domestic signed by PackageProduction_12_1_0
Using /var/tmp/junos-srx5000-12.1X46-D25.7-domestic.tgz
Checking junos requirements on /
Available space: 20438 require: 9648
Saving boot file package in /var/sw/pkg/junos-boot-srx5000-12.1X46-D25.7.tgz
Verified manifest signed by PackageProduction_12_1_0
Hardware Database regeneration succeeded
Validating against /config/juniper.conf.gz
mgd: commit complete
Validation succeeded
Installing package '/var/tmp/junos-srx5000-12.1X46-D25.7-domestic.tgz' ...
Verified junos-boot-srx5000-12.1X46-D25.7.tgz signed by PackageProduction_12_1_0
Verified junos-srx5000-12.1X46-D25.7-domestic signed by PackageProduction_12_1_0
Available space: 20438 require: 404752
WARNING: The /cf filesystem is low on free disk space.
WARNING: This package requires 404752k free, but there
WARNING: is only 20438k available.
WARNING: This installation attempt will be aborted.
WARNING: If you wish to force the installation despite these warnings
WARNING: you may use the 'force' option on the command line.
ERROR: junos-12.1X46-D25.7-domestic fails requirements check
Installation failed for package '/var/tmp/junos-srx5000-12.1X46-D25.7-domestic.tgz'
On SRX5k RE-13-20 the size of the root (/) partition is limited to 864MB. When this partition holds the currently running Junos image and backup image in /cf/packages directory, it occupies 760MB (the size of Junos OS 12.1X46 is more than 380MB). Therefore, upgrading to the new version of Junos OS may fail unless disk space is cleared on the /cf/packages directory due to "The /cf filesystem is low on free disk space" on the Compact Flash (CF).
Before upgrading, it is always best practice to check the amount of disk space available on the
/cf partition. Use the "
show system storage" command to display the current capacity.
root@> show system storage
Filesystem Size Used Avail Capacity Mounted on
/dev/ad0s1a 864M 776M 20M 98% / <<< Only 20M available
devfs 1.0K 1.0K 0B 100% /dev
/dev/md0 794M 794M 0B 100% /junos
/cf 864M 776M 20M 98% /junos/cf
devfs 1.0K 1.0K 0B 100% /junos/dev/
procfs 4.0K 4.0K 0B 100% /proc
/dev/ad0s1e 96M 26K 88M 0% /config
/dev/ad2s1f 34G 922M 30G 3% /var
/dev/md1 1007M 1.0M 925M 0% /mfs
/var/jail 34G 922M 30G 3% /jail/var
/var/log 34G 922M 30G 3% /jail/var/log
devfs 1.0K 1.0K 0B 100% /jail/dev
An upgrade, requires at least 404 MB of disk space. In the example above, there simply is not enough space. To determine which directory is taking up the most space, it's best to go into
shell mode and look at disk storage. Start with the
/cf partition, since this is where Junos loads, and use the command "
du -hs *" to list how much space each directory occupies.
root@> start shell
root@% cd /cf
root@% du -hs *
3.2M boot
2.0K dev
456K etc
0B kernel
0B kernel.old
18K opt
772M packages 12K root
134K sbin
14K usr
40K var
Since
/cf/packages is taking up 772 MB, we know that directory needs to be cleaned up.
root@% ls -l
total 791160
lrwxr-xr-x 1 root wheel 28 Nov 14 19:52 junos -> junos-12.1X46-D20.6-domestic
-rw-r--r-- 1 930 wheel 404496540 Feb 26 2014 junos-12.1X46-D15.3-domestic
-rw-r--r-- 1 930 wheel 7153 Feb 25 2014 junos-12.1X46-D15.3-domestic.certs
-rw-r--r-- 1 930 wheel 41 Feb 26 2014 junos-12.1X46-D15.3-domestic.sha1
-rw-r--r-- 1 930 wheel 525 Feb 26 2014 junos-12.1X46-D15.3-domestic.sig
-rw-r--r-- 1 930 wheel 404914400 Jul 28 22:28 junos-12.1X46-D20.6-domestic
-rw-r--r-- 1 930 wheel 7153 Jul 28 17:30 junos-12.1X46-D20.6-domestic.certs
-rw-r--r-- 1 930 wheel 41 Jul 28 22:30 junos-12.1X46-D20.6-domestic.sha1
-rw-r--r-- 1 930 wheel 525 Jul 28 22:31 junos-12.1X46-D20.6-domestic.sig
The easiest way to clean this up is to run a
request system software delete-backup from the operational prompt.
root@> request system software delete-backup
Delete backup system software package [yes,no] (no) yes
root@> show system storage
Filesystem Size Used Avail Capacity Mounted on
/dev/ad0s1a 864M 390M 405M 49% / <<< 405MB available
devfs 1.0K 1.0K 0B 100% /dev
/dev/md0 794M 794M 0B 100% /junos
/cf 864M 390M 405M 49% /junos/cf
devfs 1.0K 1.0K 0B 100% /junos/dev/
procfs 4.0K 4.0K 0B 100% /proc
/dev/ad0s1e 96M 26K 88M 0% /config
/dev/ad2s1f 34G 922M 30G 3% /var
/dev/md1 1007M 1.0M 925M 0% /mfs
/var/jail 34G 922M 30G 3% /jail/var
/var/log 34G 922M 30G 3% /jail/var/log
devfs 1.0K 1.0K 0B 100% /jail/dev
The
/cf partition now has 405 MB available, which is sufficient space to upgrade Junos.
When upgrading from 12.1X46 to another Junos 12.1X46 image, it is recommended to perform a
request system software delete-backup before doing any software upgrade operation.
To mitigate this issue, the Junos images for SRX5000 series have been decreased in size from Junos release 12.1X46-D45 onwards.
NOTE: If the device is running with SRX5K-RE-1800X4 (supported on Junos OS 12.1X47-D15), it does not have the above limitation because the size of CF storage is 4GB and the size of root (/) partition is 3.5GB.