#
# Use at your own risk: this patch would cause spindown on reboots
# which *could* hurt disk life for servers.
#
Index: sys/dev/ata/ata-disk.c
===================================================================
--- sys/dev/ata/ata-disk.c	(revision 211707)
+++ sys/dev/ata/ata-disk.c	(working copy)
@@ -207,6 +207,8 @@ ad_shutdown(device_t dev)
 
     if (atadev->param.support.command2 & ATA_SUPPORT_FLUSHCACHE)
 	ata_controlcmd(dev, ATA_FLUSHCACHE, 0, 0, 0);
+    if (atadev->param.support.command1 & ATA_SUPPORT_POWERMGT)
+	ata_controlcmd(dev, ATA_STANDBY_IMMEDIATE, 0, 0, 0);
     return 0;
 }