Hi jim.kunysz,  The warning you are seeing is for a version prior to what you are using. The upgrade from 7.2.1.3 to 7.2.1.5 isn't susceptible to that issue.  You can see what versions are impacted in the following knowledge base article. Upgrade to OneFS 7.0.x fails or is halted if the /ifs/.ifsvar directory does not use the system:any disk pool policy [URL]  If you want confirmation on that information, you could open a service request with Isilon Support.  [URL]
our isilon cluster has a single disk pool and I am running pre-upgrade checks prior to upgrading onefs code from 7.2.1.3 to 7.2.1.5  isi get -Dd /ifs/.ifsvar  the output suggests that the disk pool policy must be set to system:any  but we are not.  Disk pools:         policy system policy ID -> data target x210_40tb_1.6tb-ssd_48gb:1(1), metadata target x210_40tb_1.6tb-ssd_48gb:1(1)  notes in the attached pdf instructions indicate a severe penalty if the pool is not set to system:any  If you upgrade OneFS without setting the directory to system:any, the upgrade fails without an error message, the ifs directory becomes read-only, and services such as authentication, SMB file sharing, and the web administration interface cannot be started.        Does this apply in a Single Pool configuration?  Thanks.
isilon disk pool pre-check warning