Difference: PetalExttape (2 vs. 3)

Revision 301 Dec 2017 - StuartBorthwick1

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When a backup copy of a tape has to be exported, the procedure differs from the previous one, because backup copy tapes are not considered part of the volume they have been copied from.

Using this procedure, instead, the Volume Library will always be aware that there’s a copy of that particular tape and will keep information about its offline location.

To check which tape belongs to a volume you can use the command vllsdev using the option ‘-n’.

But when ‘set_id’ is instead used to group the tapes, you’ll see that in addition to the tapes shown before, a third tape with a seq. no. resembling the format x.x will appear.

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Previous: 3.3.1 Exporting a tape for external storage Next: 3.3.3 Deleting Files Home: Petal Documentation

When a backup copy of a tape has to be exported, the procedure differs from the previous one, because backup copy tapes are not considered part of the volume they have been copied from.

Using this procedure, instead, the Volume Library will always be aware that there’s a copy of that particular tape and will keep information about its offline location.

To check which tape belongs to a volume you can use the command vllsdev using the option ‘-n’.

But when ‘set_id’ is instead used to group the tapes, you’ll see that in addition to the tapes shown before, a third tape with a seq. no. resembling the format x.x will appear.

 

That is the backup copy of the tape with the same initial number in the sequence, in this example tape 101 is the copy of 21 :

vllsdev -n petal | grep deep2

Line: 98 to 100
 

This lengthy procedure has been found to be the best practice to assure that at any time, from within the software and using its own commands, the status and the location of any tape can be easily retrieved thus facilitating all the managing operations that keep the PETAL Service running smoothly.

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Previous: Exporting a tape for external storage Next: Deleting Files Home: Petal Documentation
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Previous: 3.3.1 Exporting a tape for external storage Next: 3.3.3 Deleting Files Home: Petal Documentation
 
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