July 2004
Intermediate to advanced
496 pages
16h 46m
English
book
IBM TotalStorage Enterprise Storage Server Implementing ESS Copy Services with IBM eServer zSeries
by Cathy Warrick, Paul Jenkin, Claus Schiefer, Jiri Spacek
Content preview from IBM TotalStorage Enterprise Storage Server Implementing ESS Copy Services with IBM eServer zSeries
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216 IBM TotalStorage Enterprise Storage Server: Implementing ESS Copy Services with IBM eServer zSeries
XRC sessions operation
When an XRC session is started, it is given a session-id and volume pairs can be added to it.
A volume pair can only belong to one XRC session, but a primary volume in one session can
be the secondary in another, and a secondary volume can be primary in another session.
An XRC session can map a volume from any primary ESS logical control unit (LCU) to any
secondary subsystem. Furthermore, primary volumes behind an ESS LCU can map onto any
number of secondary subsystems, and volumes behind multiple primary ESSs can map onto
a single secondary subsystem.
Control for starting, ending and recovering XRC operations is at ...
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