HP StorageWorks XP Remote Web Console Software - Manual (Page 19)

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