Hello list,
I'm using xfsdump for a couple of machines. The thing I never understood is
how exactly the media label is supposed to work. The xfsdump man page says:
Labels
The operator can specify a label to identify the dump ses
sion and a label to identify a media object. [...]
The media label is used to identify media objects, and is
independent of the session label. Each media file on the
media object contains a copy of the media label. An error
is returned if the operator specifies a media label that
does not match the media label on a media object contain
ing valid media files. Media labels are recorded in the
inventory.
What I would like to do (and what seems sensible to me) is record a media
label, then use those media to make, for example, daily backups. Something
like a Monday, Tuesday etc. tape.
However, if I specify "-o", xfsdump overwrites the tape without looking
(which is documented behaviour, so OK), and without -o it appends to the
media (also documented), whichever media name I specify.
Is there a way to read the media label (to reuse it)? Even better: is there
a way to tell xfsdump to only use media with, let's say, the "TUESDAY"
label, and return an error (as per xfsdump(8)) if another media is in the
streamer? Can xfsdump overwrite an older dump, while keeping the media name?
And, what should I understand from the "An error is returned" remark under
Labels in xfsdump(8)?
V.
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