We've had some issues with Exos drives dropping out of our sas controllers (LSI SAS3008 PCI-Express Fusion-MPT SAS-3) intermittently which we believe is due to this. Upgrading the drive firmware largely solved it for us so we never ended up messing about with the power settings. ________________________________ From: Alex Gorbachev <ag@iss-integration.com> Sent: 07 November 2023 15:06 To: ceph-users <ceph-users@ceph.io> Subject: [ceph-users] Seagate Exos power settings - any experiences at your sites? CAUTION: This email originates from outside THG We have been seeing some odd behavior with scrubbing (very slow) and OSD warnings on a couple of new clusters. A bit of research turned up this: https://www.reddit.com/r/truenas/comments/p1ebnf/seagate_exos_load_cyclingidling_info_solution/<https://www.reddit.com/r/truenas/comments/p1ebnf/seagate_exos_load_cyclingidling_info_solution> We've installed the tool from https://github.com/Seagate/openSeaChest<https://github.com/Seagate/openSeaChest> and disabled EPC power features similar to: openSeaChest_PowerControl --scan|grep ST|awk '{print $2}'|xargs -I {} openSeaChest_PowerControl -d {} --EPCfeature disable Things seem to be better now on those two clusters. Has anyone seen anything similar? This would seem to be a huge issue if all defaults on Exos are wrong (stop-and-go on all Ceph/ZFS workloads). -- Best regards, Alex Gorbachev -- Intelligent Systems Services Inc. http://www.iss-integration.com<http://www.iss-integration.com> https://www.linkedin.com/in/alex-gorbachev-iss/<https://www.linkedin.com/in/alex-gorbachev-iss> _______________________________________________ ceph-users mailing list -- ceph-users@ceph.io To unsubscribe send an email to ceph-users-leave@ceph.io