I would, however, concur that the copy is not "instantaneous".
Establishing the FlashCopy relationship for 300 - 400 drives takes us
somewhere on the order of a minute, so you must, for example, suspend
DB2 updates and some other update activities during the establishment
process to be sure that you have consistent volume backups that will
actually be usable for a Disaster Recovery.
Flashcopy has a "consistent flash" mode that makes it unnecessary to
suspend application updates, as long as the application is a logged
system doing dependant writes (such as DB2). Although the consistent
mode was available with Flashcopy V2, the z/OS support for it only
became available recently. It will be in the next release of FDRINSTANT
(due out in April).
--
Bruce A. Black
Senior Software Developer for FDR
Innovation Data Processing 973-890-7300
personal: [EMAIL PROTECTED]
sales info: [EMAIL PROTECTED]
tech support: [EMAIL PROTECTED]
web: www.innovationdp.fdr.com
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