02-12-2015 12:43 PM
Running NetBackup 7.1 on Windows Server 2008 R2. I have an HP StorageWorks MSL4048 tape library with 2 drives installed. These are attached with fibre to 2 fibre channel ports on the back of my NetApp FAS2240. When I run sysconfig -t and sysconfig -m on the NetApp, it shows the 2 tape drives, and the library. When I try to discover these devices in NetBackup using the storage wizard, it only finds the robotic library, and lists the 2 drives as "unused element address". I have seen this happen once before, but that was a probelm with an old NetApp that did not have tape config files for the newer LTO5 drives. This is a new NetApp that already has the HP and IBM LTO5 drive tape config files. And the NetApp detects them successfully anyway. Any ideas why NetBackup does not? We verified that ndmp is ON, and the account name and password should be good, otherwise it would detect nothing at all. I can even unplug the fibre, and run the wizard again, and it detects nothing, so I know that is all working correctly.
Solved! Go to Solution.
02-24-2015 03:35 PM
Have a look at Burt#114013. Too many tape device definition is loaded. Remove all the files except you really needed, and reboot the controller. For futher assistance, contact NetApp support.
http://mysupport.netapp.com/NOW/cgi-bin/bol?Type=Detail&Display=114013
02-12-2015 03:40 PM
"unused element address" means that tape library reported drives but NetBackup could not detect drives. Can you see any drives in "toautoconf -probe <your_filer>"?
02-12-2015 04:30 PM
A couple of things can cause an unused element address error. Usually robot issues and tape drivers. Have you tried to uninstall and reinstall the tape drivers in windows?
02-12-2015 05:20 PM
Hi,
With fibre (same for plain SCSI) tape library/drive detection issues, this sometimes helps.
That being said, if it were not HP MSL, some LUN masking work might be required from the tape library's admin console GUI but in your case I don't think that is necessary.
Hope this helps, good luck.
A
02-12-2015 07:30 PM
Unused element is normally the robot itself thinking there are no drives installed.
This has to do with control path installation - a connection between the robot and the tape drives - not the fibre connection that goes to the switch/servers.
Is the robot connected to the Windows server as well? If so, run 'scan -changer ' to show us what the robot sees internally.
Please also double-check that up to date NBU device mappings are installed on the Windows server. I will post the URL a bit later.
*** Update ***
Device mappings URL: http://www.symantec.com/docs/TECH227191
02-13-2015 02:55 AM
Are the two drives connected as one tape drive per FAS controller head?
In such a situation, one of the NetApp controller heads will probably see the robot control LUN, and also the LUN of the first tape drive - and the second NetApp controller head will see one tape drive LUN, but no robot control LUN.
You may have to partition your tape library, so that each FAS controller head can each see one robot control LUN, and one tape drive LUN.
02-17-2015 10:04 AM
Running "tpautoconf -probe sam" returns:
Host "sam" SCSI device model "HP MSL G3 Series"
It gives me the WWN, Serial, Electrical Name, and Alias 0=mc0.
It does not return any drives.
If I connect the tape library to the server directly, Windows discovers and installs drivers for the Medium Changer, and for the 2 tape drives. If I run "scan -changer", it returns the correct information, showing "Number of Drives:2", and the serial numbers for both drives.
02-17-2015 01:03 PM
02-17-2015 03:36 PM
From NetBackup perspective, NetApp dies not show any tape drives through NDMP.
2 fibre channel ports - does it mean each drives are connected to 2 ports of single controller(multipath)? What version and mode of Data ONTAP are you using? Can you podt actual output of "sysconfig -a", "sysconfig -t", "sysconfig -m", "storage alias", "storage show mc", and "storage show tape"?
02-24-2015 02:02 PM
It looks like the NetApp is not able to correctly identify the tape drive. Here is what I see:
sysconfig-a shows me the medium changer and the 2 tape drives connected to the fibre ports 1a and 1b. It shows Tape: HP Ultrium 5-SCSI Y5BW for both.
sysconfig -t shows maximum number of Dynamic Tape Qualification configuration files (64) has been exceeded. Tape Drive (1b.125) HP Ultrium 5-SCSI (Non-qualified tape drive) and Tape Drive (1a.125) HP Ultrium 5-SCSI (Non-qualified tape drive). I tried to delete some of the TCF files for drives that I know will NEVER be used, but I still see this error.
storage show tape gives me error: unable to obtain info for device <unknown> Device State: available
When I unplug the fibre, wait 1 minute, then reconnect the fibre while I have an SSH window opened up and connected, I see this error message: Data ONTAP does not recognize this tape drive: 1b.125: HP Ultirum 5-SCSI Y5BW.
I double-checked the etc/tape_config folder, and there are a bunch of tcf files in there, including the HP_LTO5_ULTIRUM.TCF file, which I assume is the one it wants to use. Is a NetApp reboot in order? Is there something I can do to eliminate the number of Dynamic Tape Qualification configuration files error?
02-24-2015 03:35 PM
Have a look at Burt#114013. Too many tape device definition is loaded. Remove all the files except you really needed, and reboot the controller. For futher assistance, contact NetApp support.
http://mysupport.netapp.com/NOW/cgi-bin/bol?Type=Detail&Display=114013
02-25-2015 11:50 AM
I removed all excess TCF files and rebooted. Everything works well now! Thank you all!