> We are attempting to backup Linux guest partitions using
> DFDSS. The manual
> says that DFDSS will work only with CDL formatted Linux partitions.
> According to dasdfmt, this is the default. I am not sure what
> comand will
> display this info. I tried yast and even dasdfmt (but it
> outputs nothing
> and takes no action for formatted volumes - clever!). Nowhere
> I could find
> out the layout.

For quite some time now, CDL has been the default. If you have no
pre-SLES7 Linux systems, then you don't have any LDL volumes (and you
shouldn't ever be creating them nowadays). So, unless you have some
really ancient Linux guests, all your volumes are CDL by default.

Note that you have to completely shut down the Linux guests to get
usable backups if you do dumps this way.

> Another question. How do people separate the VM formatted
> minidisks from
> Linux formatted minidisks for backup purposes. It seems DFDSS
> treats them
> differently. One can feed the VM directory info to a script
> and separate
> the volumes and create DFDSS control statements. Before I
> write a script I
> want to know how the torch bearers approached this issue.

Shouldn't make any difference from DFDSS's perspective AFAIK -- since
it's not a z/OS volume, you're doing physical cylinder ranges or full
volume dumps anyway, and once you're in that mode, DFDSS insn't doing
anything smart with them (it's just a binary stream; it doesn't try to
interpret it).  You might do the script to dump the minidisks as
individual ranges of cylinders, but I can't see that it's really all
that helpful to you to do that.

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