[Veritas-bu] Tape drive shutdown after Move medium requested.

Rob Worman (home) rob at worman.org
Fri Mar 11 09:27:12 CST 2005


Hello Milan -

Do you have any idea how long it took for that rewind to complete?  30  
minutes or more?

That is the situation where I would expect NetBackup to have some  
trouble.  NBU sends the "offline" ioctl (i.e. it tells the drive to  
"rewind and prepare for physical unload" and then waits for the result  
before the MOVE MEDIUM request is sent to the robot.  BUT in the  
meantime, the robotic daemon (e.g. tldd) is waiting for this to happen,  
and tldd will only wait 30 minutes before it decides something is wrong  
and it downs the robot.

In a situation like this, I'd suggest you discuss this with your  
hardware vendor.  ("why did it take this media XX minutes to rewind?")

HTH
rob


On Mar 10, 2005, at 6:02 PM, M S wrote:

> Anybody is experiencing similar problems ?
>
> NBU 4.5FP6 sends REWIND/UNLOAD command to a drive and then MOVE MEDIUM  
> command to the library.
>
> The library will attempt to move the cartridge back to it's home cell,  
> before the drive has actually ejected the cartridge. The drive hasn't  
> ejected the cartridge because the drive hasn't finished completing all  
> the steps required in a REWIND/UNLOAD command.
>
> For some reason this request time-outs and NBU system shut-down the  
> drive ?
>
> STK library console reports cleaning tape related message instead of a  
> general error.
>
> Problem is nether operating system depended (the same error on  
> different site with  HPUX  and Solaris 5.8) nor  Master/Media one  
> server or single Media server connected to the STK library.
>
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