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NIKHIL234656595's avatar
NIKHIL234656595
Level 6
13 years ago

media mismatch

i ran an inventory and i saw tha tapes is in scratch but there is a conflict.

Media id is not matching with the barcode label.

meedia id:NDLA

BARCODE: MCLABL1

 

What are the steps to corect this?

 

7.1.x and Earlier
Backup and Recovery
NetBackup
  • mph999's avatar
    mph999
    13 years ago

    Yes, that is what I was trying to explain.

    There is a LOT of mis-understanding about NetBackup and tapedrive / llibraries.

    Two of the most important things to remember :

    First (before I get shot down ....)  - the following statements are meant to cover 99% of cases ... yes, there might be a bug etc ... but that is a lot lot less likely than some other cause, and as such, based on whatever evidence I see, I would not consider this until the most likey causes are eliminated.

    For the record, I have only ever seen 1 case of robtest not working that was caued by NBU, and you are very very unlikely to see this < (and then, only if you have ACSLS).  

    1.  Everything you see in robtest is sent from the robot.  If it is wrong it is a fault with the library, not NetBackup.  The ONLY bit of NetBackup that robtest uses is the <device file> to contact the library.

    As I mentioned, I wanted you to use robtest to see the barcodes, and then if necessary, configre them via the library.

    2.  NetBackup DOES NOT write to tape - ever.  The data is sent from NetBackup to the operating system.  Although NetBackup supplies the buffer size, it is the operating system that carries out the writes (and reads) from tape, as well as positioning.

    It is certainly possible however, for NBU to cause tape write fails etc ... as the buffer sizes / number buffers come into play, but these cases are failrly easy to spot.  Out side of this, there are very very few reasons for NBU to cause tape issues.   It is failrly safe to say that :

    Errors that mention 'ioctl' 

    Anything that mentions TAPEALERT 

    ASC/ ASCQ errors

    mt 'postion errors'  (eg. MTREW failed)

    'External event caued rewind'

    ... and many more.

     

    This TN  http://www.symantec.com/docs/TECH169477 

    was written to attemt to get troubleshooting for various errors (listed in the TN) started in the right place - yes there are exceptions (and the TN mentions some) , but developing good troubleshooting skill means knowing where to start looking.

    I would estimate that the vast majority of tape/ library cases I deal with should never have been opened, as the cause is nothing to do with NBU.

    Just because NBU reports an error, DOES NOT mean Netbackup CAUSED the error.  

     

    Martin

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  • mph999's avatar
    mph999
    Level 6
    13 years ago

    The media has a totally different 'media id' than barcode.

    NDLA against MCLABL1

    The charaters 'LA' are common, but that is all.

    ... so something quite strange has happened to get that meia id from the barcide (it is possible to susbtitute charaters from the barcode and get strange media ids like this, but not very common).

    Anyway, if the tape is blank, and you are sure ...

     

    Relabel it.

    Right click the media and select label.

    there is a tick box that says something like "verify media label before performing operation", you need to untick this.

    This will then cause NBU to overwrite the media label with a new one.  It will use the media ID generation rules to derivie the media ID from the barcode if set.  If not, I think it will take the first 6 characters of the barcode, and use this as the media id.

    Martin

     

  • Marianne's avatar
    Marianne
    Level 6
    13 years ago

    What barcode is really on the tape?

    See if someone has perhaps added a Media Id generation rule?

    NBU will not do something like this automatically. 'Someone' has added this media id - either manually or via Media Id generation rule.

  • mph999's avatar
    mph999
    Level 6
    13 years ago

    Inventory the robot > Update Volume config then select advanced options button

    Then media ID generation tab

    You then specify the robot number

    The actual length of the barcode as displayed by the robot 

    (run rbtest and do s s to see how many charcters in the barcodes)

    Then you specify the actual rule

    Eg.

    1:2:3:4:5:6  -  Would take the first 6 characters of the barcode

    So if the barcode is AA1234L4

    1:2:3:4:5:6  =  AA1234

    3:4:5:6 - 1234L4

     

    .. and so on...

    It's all coverd in the manuals.

     

    Martin

  • Marianne's avatar
    Marianne
    Level 6
    13 years ago

    Please see NBU Admin Guide for UNIX and Linux, Volume I  http://www.symantec.com/docs/DOC3650

    In Chapter 9 you will find these 2 topics:

    ■ Configuring bar code rules
    ■ Configuring media ID generation rules

  • NIKHIL234656595's avatar
    NIKHIL234656595
    Level 6
    13 years ago

     

    This is Configuring media ID generation rules.

    CAN U TELL ME THE STEPS OF Configuring bar code rules?

     

    @Martin:What are the steps to create barcode.

    I want barcode to be displayed in NBU with only 5 characters.

  • mph999's avatar
    mph999
    Level 6
    13 years ago

     

    So if the barcode is AA1234L4

    1:2:3:4:5  =  AA123