-----Original Message-----
From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On
Behalf Of Mautalen Juan Guillermo
Sent: Tuesday, January 02, 2007 7:59 AM
To: IBM-MAIN@BAMA.UA.EDU
Subject: Data replication at a remote site - elementary doubt

Hi,

Sorry for this very basic question, but i am not a system programmer
(just a RACF administrator).

When you implement synchronuous (or asynchronuous) copy of your DASD
data to a remote site, is it necessary for the remote site to have a
z/OS system active?
Or is the copy performed at a hardware level between both DASD
controllers?

Thanks for your help,

<snip>

No it is not required. And until you issue commands that stop the
mirroring (depending on how implemented), the remote site can't have
anything but read access to the data, if at all. In the case of a HOT
D/R site, the remote processor(s) may be powered, but not IPL'ed. Upon
the mirroring being stopped (by commands or by the links being broken
for some reason), the "HOT" standby can now IPL.

Simple explanation for NON-Tech or someone not deeply involved in remote
mirroring.

Later,
Steve Thompson

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