How to disable using pv?

[EsDmitrii]

Hi!
I tried to get rid off from persistence for Redis by setting storageSpec: false
It helped, PVC don't creates, but I started to get this:
540:C 13 Sep 2023 17:11:08.008 # Failed opening the temp RDB file temp-540.rdb (in server root dir /data) for saving: Permission denied
Why Redis doesn't keep data in memory?
As I know, generally, Redis diskless db
Thank you in advance!