Hitachi TrueCopy for z/OS user guide (December 2005)

TrueCopy for z/OS user guide 19
Figure 2 TrueCopy components for Fibre Channel connection
XP128/XP1024/XP10000/XP12000
TC390 operations involve the main (primary) disk arrays and the remote (secondary) disk arrays. This
chapter covers TC390 operations in which the main disk array is an XP128/XP1024/XP10000/XP12000
and the remote disk array is either an XP128/XP1024/XP10000/XP12000 or other XP disk arrays. The
main disk arrays contain the TC390 main volumes (M-VOLs), which contain the original data and are
online to the host(s). The remote disk arrays contain the TC390 secondary volumes (R-VOLs), which are the
synchronous or asynchronous copies of the M-VOLs. TC390 supports all CU images and logical volumes of
the XP128/XP1024/XP10000/XP12000. All XP128/XP1024/XP10000/XP12000 with TC390 installed
are compatible with the IBM PPRC host software function. For more information on PPRC, see ”Using PPRC
Commands for TrueCopy” on page 147. TC390 also supports all physical hard disk drive options and
RAID5/RAID1 configurations for the XP128/XP1024/XP10000/XP12000.
To provide greater flexibility and to enable the XP128/XP1024/XP10000/XP12000 to be tailored to
unique customer operating requirements, additional operational parameters, or optional modes, are
available for the XP128/XP1024/XP10000/XP12000. At installation, the
XP128/XP1024/XP10000/XP12000 modes are set to their default values so HP recommends that you
discuss these settings with your HP representative. Only your HP representative can change the
XP128/XP1024/XP10000/XP12000 modes. Table 3 shows the XP128/XP1024/XP10000/XP12000
modes related to TCz and PPRC operations.
NOTE: This mode information was current at the time of publication of this document, but it may change.
Contact your HP account support representative for the latest XP128/XP1024/XP10000/XP12000 SVP
mode information.
XP128/XP1024/XP10000/XP12000 performing TC390A operations (main and remote) use sidefiles in
cache for storing the TC390A recordsets. HXRC also uses cache sidefiles. Disk arrays performing TC390A
and/or HXRC must have sufficient cache installed to handle the increased sidefile usage. Insufficient cache
can degrade disk array I/O performance and cause command retry requests and state-change-pending