Having Missing Path Errors on Tape Drives (Windows)
14 October 2009 – 19:35
If you started having problems after upgrading your tape drivers or tape drive firmwares like this:
“Missing Path” or “Unused element address”
There can be many reasons causing this error, but you can try the folllowing:
Update your drivers from the following url, then delete and re-configure tape drives on Netbackup.
http://seer.entsupport.symantec.com/docs/287850.htm
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Date: 14 October 2009
Time: 20:13
I run a Netbackup Windows environment and get the “missing path” a lot. It’s usually caused by ghost devices and here’s how to fix it. Delete the “missing path” devices from the Device -> Drives portion of the NBU GUI. Then go to the media server the drives are connected to and open up a CMD.EXE prompt. Type in “set devmgr_show_nonpresent_devices=1″ (notice underscores) then type “start devmgmt.msc”. The device management snapin should appear. Under the View menu, select “show hidden devices”. Drill down to your tapes drives. If you see any tape drive devices that are grayed out, delete them. While you’re there, verify that all the tape drives have Symantec drivers and not the built in Windows driver. Reboot the media server. When it comes back up use the same procedure to verify that the correct number of devices are showing in device manager and that there are no ghost devices. Then go to your NBU GUI and run the device discovery wizard for that media server. The correct tape devices should now show up in the GUI and without the “missing path”.
Hope it helps!
cbull