We had something similar to this on our Sunblade 1000/2000 once in a while when the engineer went to lunch.
We were seeing these messages in the /var/adm/messages file which sun informed me was part of the power management system.
Apr 22 13:57:57 humber qlc: [ID 686697 kern.info] NOTICE: Qlogic qlc(0): Loop ONLINE
Apr 22 18:05:31 humber last message repeated 1 time
Apr 23 12:28:09 humber qlc: [ID 686697 kern.info] NOTICE: Qlogic qlc(0): Loop ONLINE
Apr 23 18:33:44 humber last message repeated 1 time
SUNs advice was to remove all the associated packages pertaining to the power management applications.
Here is our correspondence with SUN:
The messages below show a known issue with Power Management. Basically the disks are being stopped after a
certain amount of time and then brought back up once the machine is woken up. This usually only causes the
machine to wake up slower than normal but it looks like this case it is slightly worse. Disabling PM should
fix this issue so if you can do this and we can then monitor the issue over the weekend to see if it stays
stable.
Mar 10 10:32:56 lagonda qlc: [ID 686697 kern.info] NOTICE: Qlogic qlc(0): Loop OFFLINE
Mar 10 10:32:56 lagonda qlc: [ID 686697 kern.info] NOTICE: Qlogic qlc(0): Loop ONLINE
Mar 10 12:58:35 lagonda qlc: [ID 686697 kern.info] NOTICE: Qlogic qlc(0): Loop OFFLINE
Mar 10 12:58:35 lagonda qlc: [ID 686697 kern.info] NOTICE: Qlogic qlc(0): Loop ONLINE
Mar 10 18:43:18 lagonda qlc: [ID 686697 kern.info] NOTICE: Qlogic qlc(0): Loop OFFLINE
Mar 10 18:43:18 lagonda qlc: [ID 686697 kern.info] NOTICE: Qlogic qlc(0): Loop ONLINE
To disable and remove Power Management on a system, do the following as root:
1. Check and see if any Power Management packages are installed. Some of the
packages may have changed in different versions of Solaris.
# pkginfo | grep "Power Management"
system SUNWpmowm Power Management OW Utilities Man Pages
system SUNWpmowr Power Management OW Utilities, (Root)
system SUNWpmowu Power Management OW Utilities, (Usr)
system SUNWpmr Power Management config file and rc script
system SUNWpmu Power Management binaries
system SUNWpmux Power Management binaries (64-bit)
2. Remove all related Power Management packages listed in step 1:
# pkgrm SUNWpmowm SUNWpmowr SUNWpmowu SUNWpmr SUNWpmu SUNWpmux
3. Remove the power management configuration file, if it exists:
#rm /etc/power.conf
4. Remove the power management startup script, if it exists:
#rm /etc/rc2.d/S85power
5. Reboot the system