[ceph-users] Slow deep-scrubs

Hi, we are operating a Ceph cluster with mostly replicated pools on SSDs, but one of our pools is erasure-coded on 16TB HDDs. Two weeks ago, we upgraded from Reef to Squid (19.2.3). Since then, there has been an ever growing number of PGs that have not been deep-scrubbed or scrubbed in time. All these PGs are located on the HDD pool. I would like to increase the scrubbing and deep-scrubbing intervals for the HDDs, but not for the SSDs. Is there any way to do that other than setting it on a per-OSD base, such as per device class or per sub-tree of the crush map? Thanks in advance for any advice! Ciao, Sven