can PMEM Logging be set up without PMEM cache enabled?

while attempting to enable pmem caching, we ran into an error in the final steps of the process where we attempted to enable the pmem logging using:

# dcli -l root -g ~/cell_group "cellcli -e CREATE PMEMLOG ALL"

we get errors for each in the cell group of:

serdbnpw1.is.payxdev.com: CELL-02984: CREATE PMEMLOG failed due to insufficient free space on the following cell disks: PM_00_serdbnpw1, PM_01_serdbnpw1, PM_02_serdbnpw1, PM_03_serdbnpw1, PM_04_serdbnpw1, PM_05_serdbnpw1, PM_06_serdbnpw1, PM_07_serdbnpw1, PM_08_serdbnpw1, PM_09_serdbnpw1, PM_10_serdbnpw1, PM_11_serdbnpw1.

background - this was disabled at time of exadata install to match our production hardware setup. not sure if this is telling me it may already be setup and/or I need to remove and redo this OR if there is just no resource available.