Planned outage of the mcu and rcu – HP StorageWorks XP Remote Web Console Software User Manual
Page 142
Planned Outage of the RCU or Remote Copy Connection
You must split all affected XP Continuous Access pairs prior to a planned outage of an RCU or of
a remote copy connection component (for example, switch or channel extender). If you do not split
the pairs first, the MCU(s) will detect the communications failure, suspend all affected pairs, and
generate SIMs reporting the failures. To perform a planned outage of an XP Continuous Access
RCU or remote copy connection component:
1.
Identify all XP Continuous Access P-VOLs that will be affected by the equipment outage. You
need to know the MCU, CU, and ID (port, GID, LUN) for each of these P-VOLs.
a.
For an RCU power-off, identify all P-VOLs that are paired with S-VOLs in the RCU to be
powered off.
b.
For a remote copy connection outage, identify all P-VOLs in all MCUs that use the
path/component to be powered off.
2.
Connect to each MCU that contains affected P-VOLs, and split all affected XP Continuous
Access pairs. Make sure to confirm the pair status changes (Pair Operation window or Detailed
Information dialog box).
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
(pairresync) all XP Continuous Access 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 XP Continuous Access 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 an XP Continuous Access MCU and RCU:
1.
If an RCU power-on will be difficult to control (for example, Power-Control-Interface setting),
you should consider increasing or disabling the Time Out (RCU ready) group option (see
) for each XP Continuous Access Asynchronous group with S-VOLs
in the RCU(s) to be powered off.
2.
Perform the planned outage of the MCU(s) as described in
. Do not power-on the MCU(s) yet.
3.
If an RCU to be powered off is connected to an MCU that is not powered off, make sure to
split those XP Continuous Access pairs before powering off the RCU.
4.
Perform the planned outage of the RCU(s) as described in
Remote Copy Connection” (page 142)
5.
Power on the RCU(s). Make sure that they are fully operational and ready to resynchronize
operations before powering on the MCUs.
6.
Power on the MCU(s), and make sure that they are ready to resynchronize operations. If you
split any pairs in step 3, you can also resynchronize (pairresync) those pairs now.
Pinned Track Recovery for XP Continuous Access Volumes
To ensure full data integrity of the pair while recovering the pinned track, use the following
procedure:
1.
Connect to the MCU of the XP Continuous Access pair that contains the volume with the pinned
track, and select the correct CU.
2.
Release the XP Continuous Access pair (pairsplit-S) that contains the volume with the pinned
track.
If you release the XP Continuous Access Asynchronous pair, release only the pair that contains
the volume with the pinned track. To release only the XP Continuous Access Asynchronous
pair that contains the volume with the pinned track, select LU for Asynchronous Parameters
and Delete Range.
142
Performing XP Continuous Access Pair Operations