Cu emulation types, Volume pairs (m-vols and r-vols) – HP StorageWorks XP Remote Web Console Software User Manual
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Hitachi TrueCopy for z/OS user guide
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The MCU and RCU can be defined separately for each TC390 pair. The XP12000/XP10000 CU can
function simultaneously as an MCU for one or more M-VOLs and as an RCU for one or more R-VOLs,
provided the remote copy connections and ports are properly configured. The XP12000/XP10000 CU
provides up to 32 logical CU images. TC390 operations can be performed on all logical devices (LDEVs)
in all logical CU images. You can use TC390 to select a CU image in the connected MCU and specify a
CU image in the RCU.
CAUTION:
If you are connecting the XP12000/XP10000 and other XP disk arrays in a mixed
configuration, verify that each disk array has a unique serial number. Although this would be extremely
rare, it is possible that a serial number overlap could occur. If you have two disk arrays with the same serial
number and you need to configure remote copy pairs between the two disk arrays, contact your HP
account support representative for assistance.
CU emulation types
TC390 supports 3990-3, 3990-6, 3990-6E, 2105, and 2107 controller emulation types for the MCU and
RCU. The emulation type of the MCU and RCU can be different. The 3990-6, 3990-6E, 2105, and 2107
emulation is required for SMS I/O time-stamping of TC390A recordsets. The 2105 and 2107 emulation
type is required for HPAV operations.
Changing from 3990 to 2105 or 2107 : If you need to change the emulation from 3990 to 2105, or 2107
for an XP12000/XP10000 that has existing HXRC pairs, you must:
1.
Stop all jobs and delete all HXRC pairs.
2.
Change the CU emulation type of all CHA packages in the XP12000/XP10000 to 2105 or 2107. Do
not intermix 3990 with 2105 or 2107 emulations in the same disk array.
3.
Restart jobs and re-establish HXRC pairs.
NOTE:
The PPRC commands are different for 3990 and 2105, or 2107 emulation types. For more
information on using PPRC TSO commands with 2105 or 2107 emulation, see ”
NOTE:
For important information on GDPS support and 2105 or 2107 emulation, see ”
Volume pairs (M-VOLs and R-VOLs)
TC390 performs remote copy operations for logical volume pairs established by the user. Each TC390 pair
consists of one main volume (M-VOL) and one remote volume (R-VOL), which are located in different disk
arrays. The TC390 M-VOLs are the primary volumes that contain the original data, and the TC390 R-VOLs
are the secondary or mirrored volumes that contain the backup or duplicate data. The main and remote
volumes must have the same format and capacity.
During normal TC390 operations, the TC390 M-VOL remains available to all hosts at all times for read and
write I/O operations. The RCU rejects all I/Os to a TC390 R-VOL. The R-VOL read option (see ”
” on page 27) allows read-only access to a TC390 R-VOL while the pair is suspended.
TC390 supports a maximum of 16,384 pairs (entire XP12000/XP10000). If the command device for
Business Continuity Manager is defined, TCz can create up to 16,383 pairs. TC390 supports the basic
logical volume images (LVIs) available on the XP12000/XP10000, such as 3390-3, 3390-3R, 3390-9,
and 3390-L. For information on LVI requirements and support, see ”