Hitachi TrueCopy for IBM z/OS User and Reference Guide (T5211-96001, June 2007)

5-66 Performing TrueCopy for z/OS Configuration Operations
Hitachi Universal Storage Platform V TrueCopy for IBM z/OS User’s Guide
Planned Outage of the RCU or Remote Copy Connection
You must suspend all affected TCz pairs prior to a planned outage of an RCU
or of a remote copy connection component (e.g., switch, extender). If you do
not suspend the pairs first, the MCU(s) will detect the communication failure,
suspend all affected pairs, and generate SIMs and console messages reporting
the failures. To perform a planned outage of a TCz RCU or remote copy
connection component:
1. Identify all TCz M-VOLs which will be affected by the equipment outage. You
need to know the MCU, CU, and LDEV ID for each of these M-VOLs.
– For RCU power-off, identify all M-VOLs which are paired with R-VOLs in
the RCU to be powered off.
– For remote copy connection outage, identify all M-VOLs in all MCUs which
use the path/component to be powered off.
2. Connect to each MCU which contains affected M-VOLs, and suspend all
affected TCz pairs. Make sure to confirm the pair status changes (TCz
Detailed Information dialog box or CQUERY TSO command).
3. Perform the planned outage of the RCU or remote copy connection.
4. When the RCU is fully powered on and ready to resynchronize operations,
resynchronize all TCz pairs at each MCU. Make sure to confirm the pair status
changes.
Planned Outage of the MCU and RCU
When you plan an outage of TCz MCUs and RCUs at the same time, the MCUs
must be powered off before the RCUs and powered on after the RCUs. To
perform a planned outage of a TCz MCU and RCU:
1. If RCU power-on will be difficult to control (e.g., Power-Control-Interface
setting), you should consider increasing or disabling the RCU Ready CT
group option for each TCzA group with R-VOLs in the RCU(s) to be powered
off.
2. Perform the planned outage of the MCU(s). Do not power-on the MCU(s) yet.
3. If an RCU to be powered off is connected to an MCU which is not powered off,
make sure to suspend those TCz pairs before powering off the RCU.
4. Perform the planned outage of the RCU(s).
5. Power on the RCU(s). Make sure that they are fully operational and ready to
resynchronize operations before powering on the MCUs.
Power on the MCU(s), and make sure that they are ready to resynchronize
operations. If you suspended any pairs in step (3), you can also resynchronize
those pairs now.