HP StorageWorks XP Remote Web Console Software - Manual (Page 64)

64 Hitachi TrueCopy z/OS for HP XP12000/XP10000 and SVS 200 storage systems
• Use SI390 to provide on-site backup copies of TC390 M-VOLs and R-VOLs.
Figure 22 TrueCopy and ShadowImage: shared M-VOL/S-VOL and R-VOL/S-VOL
The following figure shows an example of a volume functioning as both a TC390 M-VOL and an SI390
T-VOL.
NOTE: This configuration does not allow SI390 and TC390 to copy at the same time. Create the SI390
pair first, and then split the pair before creating the TC390 pair. You must suspend the TC390 pair to
resync the SI pair.
Figure 23 TrueCopy and ShadowImage: shared M-VOL/T-VOL
CAUTION: When you share a TCz R-VOL with an SIz S-VOL, the write operation to the TCz M-VOL takes
time. Especially, when the SIz pair is in the V-Split status, the write operation to the TCz M-VOL may takes
extra time according to the time for copying process of the SIz pair. In addition, note that in the case of
TCzA, the TCz pair may be suspended by failure because of the shortage of the capacity of its side file.
Combining TrueCopy for z/OS and Virtual LVI/LUN
Virtual LVI/LUN volumes can be assigned to TCz pairs, as long as the R-VOL has the same or larger
capacity than the M-VOL. If you need to perform Virtual LVI/LUN operations on an existing TCz M-VOL or
R-VOL, you must delete the pair first to return the volume to simplex status. For further information on Virtual
LVI/LUN, see the HP StorageWorks XP LUN Configuration and Security Manager user guide.
Combining TrueCopy for z/OS and Cache Residency Manager
Cache Residency Manager volumes can be assigned to TCz pairs, and Cache Residency Manager
operations can be performed on TCz M-VOLs and R-VOLs. For further information on Cache Residency
Manager, see the HP StorageWorks Cache LUN XP user guide for your disk array model.
Combining TrueCopy for z/OS and XP Performance Control
XP Performance Control software can give higher priority to the I/O operations of the server that requires
the high processing performance than the I/O operations of the other servers. XP Performance Control can
set the priority of I/O operation to ports, but if the remote copy is performed with the Fibre Channel
interface connection, the initiator ports do not support the XP Performance Control option. For further
information on XP Performance Control, see the HP StorageWorks XP Performance Control user guide: HP
XP12000 Disk Array, HP XP10000 Disk Array.