Junos OS

Juniper SRX300:

even after zeroize , tmp, log , old backup files clean the /dev/md1storage is observed 100% occupied. trying to free up the space but it's unchanged. any input?

root> show system storage 
Filesystem              Size       Used      Avail  Capacity   Mounted on
/dev/da0s1a             2.4G       425M       1.8G       19%  /
devfs                   1.0K       1.0K         0B      100%  /dev
/dev/md0                 20M        12M       5.7M       68%  /junos
/cf/packages            2.4G       425M       1.8G       19%  /junos/cf/packages
devfs                   1.0K       1.0K         0B      100%  /junos/cf/dev
/dev/md1                1.4G       1.4G         0B      100%  /junos
/cf                      20M        12M       5.7M       68%  /junos/cf
devfs                   1.0K       1.0K         0B      100%  /junos/dev/
/cf/packages            2.4G       425M       1.8G       19%  /junos/cf/packages1
procfs                  4.0K       4.0K         0B      100%  /proc
/dev/bo0s3e             185M        20K       170M        0%  /config
/dev/bo0s3f             2.1G        15M       1.9G        1%  /cf/var
/dev/md2                1.0G       118M       831M       12%  /mfs
/cf/var/jail            2.1G        15M       1.9G        1%  /jail/var
/cf/var/jails/rest-api       2.1G        15M       1.9G    1%  /web-api/var
devfs                   1.0K       1.0K         0B      100%  /jail/dev
/dev/md3                1.8M       4.0K       1.7M        0%  /jail/mfs

root>

Totally normal behaviour.

md0, md1, md2 etc. are all read-only virtual  Memory Disks.

% mdconfig -l -u 0
md0     malloc     20M
# malloc type is used for UTM.

% mdconfig -l -u 1
md1     vnode     1.4G  /cf/packages/junos
# vnode type

% mdconfig -l -u 2
md2     swap      1.0G
# this is swap for when the system is under memory pressure.

etc.

Whereas the partition /cf/var is used to store logs, cores, temporary packages etc.  This is typically the partition that you need to free up space on when an upgrade fails due to lack of free space.

Regards,