Hi Geln,
This could be a bug even. Renaming from log00 to log0 is not being picked up in DFM. What version of ontap are these systems running ? Can you make the snmp version 3 as preferred version for communication between DFM and filer. Lets see if this solves.
dfm host set <filerip/id> prefsnmpVersion=3
This is supported only for DOT version 7.3 or later and the password must be atleast 8 characters long.
Also glen, to your question deleting the volume on dfm does not delete it on the filer, unless you do it from the NMC dataset->Provisioning Page.
Regards
adai