Howto fix Unity VSA Community edition issues without access/permissions

Howto fix Unity VSA Community edition issues without a more reliable self-managment?

VSA not available due to /nbsnas partition becomes 100% full.
Service/admin user is unable to delete logs under /nbsnas.
So solution is only to re-deploy and configure it new or restore from backup/snapshot ?

13:51:31 service@VIRT18357JMMYS spa:~/user#
13:51:31 service@VIRT18357JMMYS spa:~/user# df -k
Filesystem 1K-blocks Used Available Use% Mounted on
udev 1056804 8 1056796 1% /dev
/dev/sda5 10258512 6171056 3546792 64% /
tmpfs 2246972 65500 2181472 3% /dev/shm
tmpfs 2246972 218516 2028456 10% /run
tmpfs 2246972 0 2246972 0% /sys/fs/cgroup
/dev/ram0 59493 2331 57162 4% /tmp
/dev/sda6 8319928 1256452 6627664 16% /cores
/dev/sda1 114901 1668 107089 2% /mnt/c4lx-cfg_msata
/dev/sdc5 14523992 1058348 12739220 8% /EMC/backend/service
/dev/sdb9 999320 520940 425952 56% /EMC/backend/CEM
/dev/sdb8 245679 232572 0 100% /nbsnas
/dev/sdb11 648816 700 614324 1% /EMC/backend/perf_stats
/dev/sdb10 3383564 789548 2418812 25% /EMC/backend/log_shared
/dev/sdb12 3030800 193948 2679568 7% /EMC/backend/metricsluna1
/dev/sdb13 245679 2144 230428 1% /EMC/fastvp

13:51:32 service@VIRT18357JMMYS spa:~/user#