>>> On Tue, Jun 24, 2008 at  8:01 AM, in message
<[EMAIL PROTECTED]>,
"Walters, Gene P" <[EMAIL PROTECTED]> wrote: 
> We use DFDSS to do preliminary full volume backups of Linux volumes.  In
> doing so, we have had a few problems backing up some of our mod-9's that
> we setup as minidisks, as opposed to dedicated.  For some reason, some
> of our volumes will show a z/os dataset name such as
> LINUX.VLX114B.PART0001.NATIVE, some do not show a z/os dataset name at
> all.  It is the one that do not show a z/os dataset name, that we have
> problems backing up.
 -snip-
> How does that name get generated on the Z/OS side?  

It is created by running the Linux dasdfmt and fdasd commands.

> Why does it get generated on the Z/OS side for dedicated dasd, but not
> for mini-disks?

Because for mini-disks, the z/VM systems programmer does not allocate cylinder 
0 to the Linux guest.  So, when Linux writes the VTOC on what it thinks is 
cylinder 0, it is really writing it somewhere else.

> How can I get it on the Z/OS side for the mini-disks?

It should have been created by z/VM when it was CP formatted by the z/VM 
systems programmer.  If it was not, they need to look at how they're 
initializing the volumes.


Mark Post

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