FLASHCOPY SYNC is only useful for older (Version 1) FlashCopy hardware.
Modern storage subsystems, such as DS8000, will not change their behavior
with this parameter. From the FLASHCOPY helpfile:
SYNChronous
(For FlashCopy Version 1 hardware) tells CP to process the command
immediately and to wait until the hardware has accepted all
parameters,
all messages from the Enterprise Storage Server(R) (ESS) subsystem
have
been processed, and the FLASHCOPY command completes.
As stated previously, issuing a second FLASHCOPY command while one is in
progress will result in an error.
The CP QUERY FLASHCOPY HARDWARE command can be used to determine if a
FlashCopy has completed it's background copy or not, regardless of whether
or not it's a persistent relationship.
Regards,
Eric
Eric Farman
z/VM I/O Development
IBM Endicott, NY
(607)429-4958 (tie 620)
From:
Kris Buelens <kris.buel...@gmail.com>
To:
IBMVM@LISTSERV.UARK.EDU
Date:
06/17/2011 04:03 PM
Subject:
Re: CLONEBKP: New package at zVM/downloads
Sent by:
The IBM z/VM Operating System <IBMVM@LISTSERV.UARK.EDU>
FLASHCOPY SYNC does not wait until the target disk is copied. So, you can
try to launch a second FLASHCOPY while the previous is still busy, and
your attempt will fail.
2011/6/17 Alan Altmark <alan_altm...@us.ibm.com>
On Friday, 06/17/2011 at 01:37 EDT, Scott Rohling
<scott.rohl...@gmail.com> wrote:
> It will likely fail, with a message that the target is not in the
required
> state and is the target of an existing flashcopy... until the
background
> copying finishes -- you won't be able to flash to the same target.
This sounds like a good use of the FLASHCOPY SYNCH option.
Alan Altmark
z/VM and Linux on System z Consultant
IBM System Lab Services and Training
ibm.com/systems/services/labservices
office: 607.429.3323
mobile; 607.321.7556
alan_altm...@us.ibm.com
IBM Endicott
--
Kris Buelens,
IBM Belgium, VM customer support
