Hi Etienne, Thanks for your answer. I actually had to remove the class first. So for example this 2-step process works: ceph osd crush rm-device-class osd.0 ceph osd crush set-device-class sdd osd.0 osd tree now reports correctly sdd as class. Funilly enough "ceph orch device ls" still reports hdd as class but maybe this is a matter of time that it changes in the orchestrator. ‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐ On Monday, August 16th, 2021 at 12:10 PM, Etienne Menguy <etienne.menguy@xxxxxxxx> wrote: > Hi, > > Changing device class works? > > https://docs.ceph.com/en/latest/rados/operations/crush-map/#device-classes > ceph osd crush set-device-class <class> <osd-name> [...] > > Étienne > >> On 16 Aug 2021, at 12:05, mabi <mabi@xxxxxxxxxxxxx> wrote: >> >> Hello, >> >> I noticed that cephadm detects my newly added SSD disk as type HDD as you can see below: >> >> $ ceph orch device ls >> Hostname Path Type Serial Size Health Ident Fault Available >> node1 /dev/sda hdd REMOVED 7681G Unknown N/A N/A No >> >> How can I force the disk type to SSD instead of HDD? >> >> Regards, >> Mabi >> _______________________________________________ >> ceph-users mailing list -- ceph-users@xxxxxxx >> To unsubscribe send an email to ceph-users-leave@xxxxxxx _______________________________________________ ceph-users mailing list -- ceph-users@xxxxxxx To unsubscribe send an email to ceph-users-leave@xxxxxxx