vCenter Server disk partitions on Linux or Windows are at 100% usage (i.e. the / partition)
VMware vCenter Server
Old support bundles may not be deleted automatically by the vCenter. The log bundles may be created in one of the following directories:
/etc/vmware-vpx/docRoot/diagnostics OR /etc/vmware-vpx/bundle-stage
C:\ProgramData\VMware\vCenterServer\cfg\vmware-vpx\docRoot\diagnostics
Manually delete the support bundle(s) in the relevant directory. After deleting the bundle(s), disk usage will be reduced on the related partition.