Networker : device changed to service mode

ambird

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Sun StorEdge(TM) Enterprise Backup device disabled: (warning) Device /dev/rmt/1cbn is automatically disabled.
consecutive errors (21) exceeded the maximum consecutive errors allowed.
Please fix the device or set a higher value for the Max consecutive errors attribute in the device resource.
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NSR遇到很多读写错误，把这个设备禁止了。这之前我label几盘新买的磁带，对于所有不认识的磁带，都会报错吧（defalt : error >20).enable the device,就可以了。

参考：
http://www.tek-tips.com/viewthread.cfm?qid=1222012&page=2


NWNinja (IS/IT--Management) 25 Apr 06 8:37  
It means that the devices are having read or write problems. Too many errors will cause them to go into service mode.
You should check the logs and see if there perhaps is a bad tape that is causing this. I would also suggest cleaning the tape drives, as dirty drives may cause read/write errors.
The daemon.log will tell you more about this problem.
Cheers!
Maverick

ljg (IS/IT--Management) 25 Apr 06 13:24  
I've also noticed that our new tape library processes "no label found" entries (when labeling new tapes) as errors - and our max error allowance was 20 but there were 24 tapes in the labelling process.  You can change the maximum consecutive errors allowed by a device - edit the device (the tape drive, not the library) and you'll see the option on the configuration tab.

605 (Instructor) 25 Apr 06 13:30  
@ljg
I would not recommend this in general. Use Auto Media Management instead and leave the job to NetWorker. Because NW will only label media when needed, you most likely will never encounter 20 consecutive errors.


Rexxy (MIS) 27 Apr 06 0:04  
but also be aware that Auto Media Management means that the networker server will USE/LABEL any media it finds that it doesnt recognise.... i.e. it assumes that these tapes are blank as they havent been used by that nsr server before...
if you have loaded up tapes from a different nsr server etc for restore purposes etc, or whatever reason, and havent write locked them, it can and will overwrite them if your not careful.....
if someone accidently (yes by accident) removes a volume, i.e. nsrmmd -d  or from gui.....and you deposit it in the jukebox to begin a scan or the tape etc, again if it isnt write locked.....it may relabel it....

605 (Instructor) 27 Apr 06 11:32  
Well, NW assumes that an administrator is clever enough to only insert the media into a jukebox to be (re-)used by NW.
Tape labels are only there to prevent media from being acctidentally overwritten by the SAME application. NW does not behave different than any other BU software.
BTW, as far as i have seen NetWorker, it will reuse an old (recyclable) media before it will try to label an unkown tape.




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