I think the storage server I'm working on at home (current omnios stable) is spinning down disks; whenever I get back to it after not touching it for a while, anything touching my export pool (dual 6 x 3TB WD Red RAIDZ2) takes a long time to respond, and then goes back to normal.
My current power.conf is: ----- autopm enable autoS3 disable cpupm enable cpu_deep_idle enable cpu-threshold 1s ----- I had thought that when running on server class hardware the default was not to spin down drives, but perhaps I was mistaken? Hmm, or maybe the default is to just skip power management completely, and explicitly turning it on turned on everything. I'm thinking about adding "system-threshold always-on" to the configuration, which I guess will disable all power down functionality, other than CPU, which is controlled by the "cpu-threshold" parameter? What other power savings would this turnoff? I am in general in favor of saving energy :), other than for the disks, as the latency is too high and causes too much of a delay, and it's not clear if setting the system-threshold to stop spinning down disks will also disable other potentially desirable power savings. I guess the other option would be to explicitly configure device-thresholds for all of the disks individually. Is there any way to list what components of a system support power management? While on the subject, any thoughts on event-mode vs poll-mode for cpupm? It's not clear from the man page what the default is if you just set it to "enable". Thanks. ------------------------------------------- illumos-discuss Archives: https://www.listbox.com/member/archive/182180/=now RSS Feed: https://www.listbox.com/member/archive/rss/182180/21175430-2e6923be Modify Your Subscription: https://www.listbox.com/member/?member_id=21175430&id_secret=21175430-6a77cda4 Powered by Listbox: http://www.listbox.com
