can't see all drives up

What does sgscan show? This might be and issue where the sgdrivers need to be rebuilt. Please try TECH63095 for that.

run: cfgadm -al

Print the results

Rebuilding sg drivers does NOT need a reboot. It does not even need NBU to be stopped.
I have probably done it hundreds of times at various customers over the years.....

PS: 

Your screenshot is too small - I cannot make out anything........

hello

thanks all for your response, before i do these steps (can't reboot right now, production server) here is a screenshot after the GUI scan says that other drives that can't be seen on tpconfig are attached to remote host, and can't be selected .

here is cfgadm -al for tapes : all 24 drives are seen

for information : i didn't run your action plan yet Terry, because of rebooting. i'll do it later

thanks

hello, thank you, i'v updated my response

hello

thanks a lot Marianne, you actions worked grathfully, i can see all my drives, but the question i am conserned about is may be the SMS was access restricted  for all 24 drives,it was geven access for only 13, is that possible? and how it can be done, and what your comment about the scan result screenshot above. thank you a lot, you're well know of your expertise and have a grate reputation in our Team

best regards.

I think it is pretty 'normal' for NBU sg driver to NOT see all the drives on Solaris.

Probably something to do with default of 7 devices per controller. 

I have had to rebuild sg drivers on Solaris for as long as I've known NBU (15 years....)
I used to open the text version of DeviceConfigGuide in /usr/openv/volmgr in one window and search for the commands and simply copy & paste... I also learned very early that the doc had the commands the wrong way round -  sg.build appears after sg.install! 
With some hba's, some files had to be edited and entries added manually before sg.build could be run.

If drive paths appear in /dev/rmt with wwn as part of device names (as seems to be in your case), there is no need to specify -mt and -ml.

in my case, in /dev/rmt there are device names without wwn

ok thank you a lot, this was verry helpfull