tape drive cleaning.

[NIKHIL234656595]

Drive Name  Type      Mount Time  Frequency   Last Cleaned         Comment
**********              ****      **********  *********   ****************     *******
DRV04            hcart*    211.2       0           06:53 04/14/2012
DRV01            hcart*    9.8         0           01:20 04/25/2012
DRV03            hcart*    137.7       0           19:40 04/16/2012
DRV02           hcart*    12.6        0           05:12 04/25/2012
 

What is this mount time?

And why no frequency is shown here?

Is it reactive cleaning.?

[Yasuhisa_Ishika]

"Mount Time" means accumulated time of use from last cleaning.

> And why no frequency is shown here?
No, frequency is displayed as 0 here. 0 is default value.

You should check product guides or participate traning course before you ask such elemental question.

[Marianne]

Have a look at this link: http://www.lmgtfy.com/?q=site%3Asymantec.com+netbackup+frequency+drive+cleaning

[mph999]

if freqency based cleaning was used, you would have a freq. value . as it is 0 we see freqency based cleaning is not used. note that frequency based cleaning should NOT be used. we see from the dates that the drives hsve been cleaned, so therefore it appears you are using reactive cleaning, that is the drives are cleaned when they request cleaning, which is correct .

[Will_Restore]

led me to this Best Practice

http://www.symantec.com/business/support/index?page=content&id=HOWTO56117

[NIKHIL234656595]

How to set reactive cleaning on tape drives?

[mph999]

In a way, you don't.

TapeAlerts are 100% nothing to do with NBU, they are SENT from the tapedrive.

By default NBU will detect these and will attempt to clean the drives (if cleaning tape available etc ...)

What may have happened is that the ability of NBU to detect te tapealert may have been disabled (for example, if the library was doing the cleaning).

Check for this file :

/usr/openv/volmgr/database/NO_TAPEALERT

(or <install path>\veritas\volmgr\NO_TAPEALERT )

If this file exists, 'tapealert detection' has been disabled - remove this file to 're-enable'

As far as the cleaning tapes go - set the density to match the tape drive (but with -cln ) eg. if you have hcart2  drives, you want to select the hcart2-cln density, they must be in the NONE pool and make sure the number of remaining cleanings is >0 (Once inventoried and configured, just right click the cleaning media and select change to adjust the number of cleanings remaining).

The number of cleanings remaining differs depending on the make of tape drive, the make of cleaning tape etc ... Just set it to 40 or something, once it is used, it will not be 'overused'/  Consult drive / cleaning tape manufacturer for more info in this area, Symantec do not have this information.

http://www.symantec.com/docs/TECH9109

http://www.symantec.com/business/support/index?page=content&id=TECH37409

Make sure all cleaning is disabled on the library and that any 'library defined cleaning slots' are deleted.

In NBU, the cleaning tapes are not in special slots, they are just regular tapes that have a 'cleaning density' matching the 'density' of the tape drives, and, are in the NONE volume pool.

Some technotes that Marianne mentioned a short time ago in another post:

http://www.symantec.com/docs/TECH8452

http://www.symantec.com/docs/TECH19399

http://www.symantec.com/docs/HOWTO33906

Martin

[NIKHIL234656595]

ok,so how to check how often these drives are cleaned?

[mph999 · Accepted solution]

You have this answer already, it is in the first post you made in this thread.

Drive Name  Type      Mount Time  Frequency   Last Cleaned         Comment

**********              ****      **********  *********   ****************     *******
DRV04            hcart*    211.2       0           06:53 04/14/2012
DRV01            hcart*    9.8         0           01:20 04/25/2012
DRV03            hcart*    137.7       0           19:40 04/16/2012
DRV02           hcart*    12.6        0           05:12 04/25/2012
 

You get this output by running /usr/openv/volmgr/bin/tpclean -L

Martin 

[NIKHIL234656595]

yes THats correct.

But i wana know how often these drives are clean?

tpclean -L gives me last cleaned.