Sometimes you might run into a failing TSM4VE backup. In this case, when the creation of a snapshot is not possible. A good place to start is to use VMware’s vSphere software to try to manually create the snapshot.
A common misunderstanding is that sometimes this “direct” VMware snapshot performs just fine and someone thinks that TSM4VE must be the problem. To correctly mimic TSM4VE’s snapshot behavior on the VMware level you need to select the correct options.
In the past I’ve seen that people are asking for a TSM backup to /dev/null. It’s also a request on the ADSM.ORG forum and the ADSM-L mailing list. A TSM backup to /dev/null appears to be a myth. Or is it?
This procedure used to be available for customers through the TSM support site. However, it looks like this procedure is not published anymore. There is no mention of it at all in the Administrator’s Guide or Administrator’s Reference. So, this must be considered as undocumented, but it is possible – and although not common knowledge, it might be very interesting for TSM administrators for testing and troubleshooting purposes. I mean, even if you don’t have the storage, you now can emulate DBB’s, clients backups, backup stgpools, etc. All the processing from a TSM client/server perspective still happens, but the actual data is not stored.
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