Excessive Positioning NBU 5.0 1

[c0ff33d]

I recently installed the MP4 patch on my master and media servers, since the install I have noticed excessive postioning in the job logs. The day before I installed maintenance pack 4 I had 0 issues with my NBU environment.

I did place the latest device_mappings.txt file in the share directory and installed the latest veritas drivers.

I am seeing this shoeshining occuring on two libraries, one being a SDLT, one being LTO. Both library's were working just fine before the maintenance pack update.

Any suggestions?

 

[GreyWanderer]

In the Activity Monitor, the term "Positioning" is new in MP4, it does not necessarily mean the tape is shoeshining, it more than likely is spinning up to the next available block. Prior to MP4, the term "mounting" was used for the actual mount and position part of the tape process. Are you receiving 84 or 86 errors as well?

 

[c0ff33d]

GreyWanderer,

Thanks for info about this, I had'nt noticed that it changed from “mounting” to “positioning”. I am receiving 84 errors on a few of the jobs. It appears that this is occuring on the jobs that show “positioning” several times over. I am hoping this isn't truely a hardware issue, and I don't believe it is since these 84 errors just started after MP4 was installed.

Any info or suggestions would be most appreciated.

 

[lenski]

Job which have 84 errors will show positioning or monting more as they attempt intially to over come the problem by re-reading or writing to the same position