On Thu, 12 Apr 2012 09:23:05 -0400, Rob Schramm <[email protected]> wrote:
>I am unsure of how many people are out there on the list using EMC DLM
>for tape. But EMC is being a bit less than helpful in answering the
>question.
>
>I want to create a snapshot of the current production DLM tapes for
>use in disaster recovery testing. Has anyone else done this?
>
To use their terms "read/write checkpoints". Yes, I've done it many times.
The
implementation team should have provided scripts for creating r/w ckpts and
deleting them. In addition, after the checkpoints are created you have to
run scripts in each VTE to unmount the R/O file systems and mount the
R/W checkpoint file systems ("SNAPs") if you want to do any testing
that writes to scratch tapes. The VTE scripts just update the fstab and
shutdown / restart the software in the VTE. One of my clients has
2 DLms, 4 VTEs per DLm and about 1PB of storage per DLm.
At least this is how it is typically done. I have heard of some variations.
It's actually pretty slick. I love working in a tapeless environment these
days. No more waiting for HSM ML2 recalls, report archive recalls, etc.
Mark
--
Mark Zelden - Zelden Consulting Services - z/OS, OS/390 and MVS
mailto:[email protected]
Mark's MVS Utilities: http://www.mzelden.com/mvsutil.html
Systems Programming expert at http://expertanswercenter.techtarget.com/
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