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rob@xxxxxxxxx wrote on Wed, 13 Nov 2013 16:19:56 GMT:

having to power down the system was a bit of a shocker, or is
that how other platforms work with flash copy?


All storage systems have the challenge, you can make a copy of
the data that has been written to storage, but when you "flash
copy", you only get that data. Any data in main storage of the
server which has been updated, the storage has no knowledge of,
cannot be copied. This is why it is considered a "crash
consistent" copy because when a server crashs, the contents of
memory are generally lost.

To be 100% certain all data has been written by the server
operating system to disk, you must shut down the server.

IBM i, Windows, Linux, AIX, zOS ... all have the same
requirement.


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