Tom, The disks could be kept busy. Perhaps some checking would help to figure this out.
o find out the (dev_info_t *) dip for the two sata disks, and dump out their devi_pm_components from mdb, look for pmc_numlevels, it should be >1. - most likely this is not an issue, but just to be sure. o run dtrace on both pm_busy_component(dev_info_t *dip, int cmpt) and pm_idle_component(dev_info_t *dip, int cmpt) calls for the "dip" that matches the two sata disks' dip. If the sata disks were idle'ed for too short a period (i.e. <60s), they won't be powered down. Then you might want to dtrace its strategy(9e) routine to figure out what thread was keeping them busy. There might be a kernel thread constantly polling for the SMART data... -jane -- This message posted from opensolaris.org