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Copy a DFSMSdss Dump Dataset

 
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Roland_Achtsnit

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PostPosted: Fri Oct 10, 2008 1:16 am    Post subject: Copy a DFSMSdss Dump Dataset
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Hello

I have some dump datasets stored on a tape.
The DCB is RECFM=U,LRECL=0 and BLKSIZE=65520.
I must copy these dump datasets on DASD Volumes.
I know COPYDUMP in dss cannot reblock the BLKSIZE.
COPY in dss with the REBLOCK - option does not work with RECFM=U.

One option ist to RESTORE the datasets on the TESTPLEX and then create a new dump from these datasets on DASD.

Is there any other way to copy these files.

I hope anyone can help me.
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expat

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PostPosted: Tue Oct 14, 2008 1:26 pm    Post subject:
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I'm not sure what other products could help you.

Just clutching at straws on your behalf here, but I do recall using IEHMOVE to copy RECFM=U datasets in the past and to change the attributes of the output dataset.

Don't know if this might help, but good luck
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dick scherrer

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PostPosted: Tue Oct 14, 2008 7:36 pm    Post subject:
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Hello,

Due to the large blksize, you may also find that you have this to deal with:
Quote:
A magnetic tape data set with a block size greater than 32,760 is being opened for input or output extend processing, but the large block interface is not being used


I seem to recall something that handled large-blksize backups called COPYCAT (Part of CA-1), but i have not used it in a while.
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Robert Sample

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PostPosted: Tue Oct 14, 2008 7:50 pm    Post subject:
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From the Storage Administration Reference manual for DFSMS:
Quote:
The COPYDUMP command cannot change the block size of the DFSMSdss dump data set. If you are copying a dump data set to a DASD device, the source block size must be small enough to fit on the target device.

Notes:

1. Extra dump tapes can be used for such things as disaster recovery backup or distribution of dumped data (for example, a newly generated system).

2. COPYDUMP is the only supported method for copying DFSMSdss dump data sets. Using a copy produced by any other method or utility as input to a RESTORE operation can produce unpredictable results.
So according to the quote, you cannot change the block size. AND COPYDUMP is the only IBM-supported way to copy dumps. Conclusion: you're not going to be copying these dump datasets to disk, no matter how much you want to, unless you can define a disk dataset with a block size of 65520. I suggest you start working on the restore.
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expat

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PostPosted: Tue Oct 14, 2008 7:53 pm    Post subject:
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Quote:
AND COPYDUMP is the only IBM-supported way to copy dumps.

I agree, and as I said was just clutching at straws on behalf of the OP.

However, I have quite often copied Dfdss dump tapes using IEBGENER and these were sucessfully used for restores. But hey, nostalgia just isn't what it used to be icon_lol.gif
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Robert Sample

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PostPosted: Tue Oct 14, 2008 7:59 pm    Post subject:
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Quote:
However, I have quite often copied Dfdss dump tapes using IEBGENER and these were sucessfully used for restores. But hey, nostalgia just isn't what it used to be
I tried a few times on our z/OS 1.4 system but never could get the copied file to restore correctly -- you must have been lucky (or holding the beer bottle at the right angle?)!
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expat

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PostPosted: Tue Oct 14, 2008 8:04 pm    Post subject:
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z/OS - no, this was way back in the MVS release days, none of this new fangled z/OS stuff icon_biggrin.gif

Once I discovered duplicate outputs were possible, it became academic.
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Roland_Achtsnit

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PostPosted: Sat Oct 18, 2008 12:25 pm    Post subject: Reply to: Copy a DFSMSdss Dump Dataset
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My problem is: These Datasets must be able to be restored correctly also in the future and so I think it is better to restore this files and create a new dump dataset on DASD Volume.

Perhaps in the future there is the possibility to work with COPYDUMP such Datasets and change the BLKSIZE.

Thanks for your assistance.


Roland
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