Here’s a common scenario \u2013 you want to label a volume, or relabel a volume, and use it straight away. The default behaviour of NetWorker after labelling or relabelling a volume is to then unmount it, which means having to then manually mount the volume after it has been (unnecessarily) ejected.<\/p>\n
Getting around this behaviour is quite easy, and just requires a bit of typing on the command line.<\/p>\n
Let’s look first at relabelling, since this is arguably the most common scenario. Say you’ve got a volume in slot 21 of your tape library that you want to relabel and have it remain mounted so you can immediately start using it. For a normal relabel operation you’d consider something like:<\/p>\n
# nsrjb -LRYvvv -S 21<\/pre>\nNote 1<\/strong>: I always put in the ‘-vvv’ option whenever dealing with a jukebox. These days I practically consider it to be ‘best practices’.<\/p>\n
Note 2<\/strong>: In the examples in this article I’m using the -Y switch, which means NetWorker does not prompt for any confirmation on the operation (it assumes Yes in response to any question it may have); this is done only for the purposes of keeping example output simplified, and I don’t recommend you get in the habit of using it.<\/p>\n
Instead of using the -L option here, we switch to -l (for load); thus the command becomes:<\/p>\n
[root@tara ~]# nsrjb -lRYvvv -S 21\nsetting verbosity level to `3'\nInfo: Preparing to load volume `BIG990S3' from slot 21 into device `\/dev\/nst0'.\nInfo: Loading volume `BIG990S3' from slot `21' into device `\/dev\/nst0'.\nInfo: Load sleep for 5 seconds.\nInfo: Performing operation `Verify label' on device `\/dev\/nst0'.\nInfo: Operation `Verify label' in progress on device `\/dev\/nst0'\nInfo: Performing operation `Label' on device `\/dev\/nst0'.\nInfo: Operation `Label' in progress on device `\/dev\/nst0'\nInfo: Recycling volume `BIG990S3'<\/pre>\nThat’s it – those of you familiar with highly verbose nsrjb output will recognise that there’s no “Unmount in progress” style message; the volume remains mounted and instantly ready for use once the relabel operation is complete.<\/p>\n
Now, moving on to a tape that hasn’t previously been labelled, we’d usually use a command such as:<\/p>\n
# nsrjb -LYvvv -b poolName -S x<\/p>\n
However, to keep the tape mounted after labelling, we need to include the ‘-m’ option; thus, if we wanted to label the tape in slot 1 into the “Default Clone” pool and keep it mounted after labelling, our command would look like the following:<\/p>\n
[root@tara ~]# nsrjb -mLYvvv -b \"Default Clone\" -S 1\nsetting verbosity level to `3'\nInfo: Preparing to load volume `800843S3' from slot 1 into device `\/dev\/nst0'.\nInfo: Loading volume `800843S3' from slot `1' into device `\/dev\/nst0'.\nInfo: Load sleep for 5 seconds.\nInfo: Performing operation `Verify label' on device `\/dev\/nst0'.\nInfo: Operation `Verify label' in progress on device `\/dev\/nst0'\nInfo: Expected volume `800843S3' in slot `1'. The actual volume is `<NULL>'.\nInfo: Cannot read the current volume label `no tape label found'.\nInfo: nsrmmgd assumes the volume is unlabeled and will write a new label.\nInfo: Performing operation `Label' on device `\/dev\/nst0'.\nInfo: Operation `Label' in progress on device `\/dev\/nst0'\nInfo: Label: `800843S3', pool: `Default Clone', capacity: `<NULL>'.<\/pre>\nThere you go … and don’t forget Note 2 above! It’s not wise to get into the habit of throwing a -Y into nsrjb commands; the examples only show it to keep the examples simpler.<\/p>\n","protected":false},"excerpt":{"rendered":"
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