/usr/home

Just add a few lines in the /etc/power.conf:

# device-thresholds
device-thresholds       /pci@0,0/pci103c,1609@11/disk@2,0 15m
device-thresholds       /pci@0,0/pci103c,1609@11/disk@3,0 15m

The PCI-IDs can be found by typing in “format”:

root@galactica ~ # format
Searching for disks…done

AVAILABLE DISK SELECTIONS:
0. c2t2d0
/pci@0,0/pci103c,1609@11/disk@2,0
1. c2t3d0
/pci@0,0/pci103c,1609@11/disk@3,0
2. c2t5d0
/pci@0,0/pci103c,1609@11/disk@5,0
Specify disk (enter its number):

After that, activate your changes by running “pmconfig”.

See also: http://constantin.glez.de/blog/2010/03/opensolaris-home-server-scripting-2-setting-power-management