HP StorageWorks XP Remote Web Console Software - Manual (Page 46)

46 Hitachi TrueCopy z/OS for HP XP12000/XP10000 and SVS 200 storage systems
NOTE: Administrator access to the XP Command View Advanced Edition Software server or XP
Remote Web Console is required to perform TC390 operations. Users without administrator access
can only view TC390 information.
NOTE: You must operate XP Remote Web Console in Modify mode to perform TC390 operations.
Users in view mode can only view TC390 information.
• About the license of TrueCopy for z/OS Asynchronous:
To use TC390 Asynchronous, you must install not only a license for TC390 Asynchronous but also a license
for TC390. Also, the license capacity of TC390 and the license capacity of TC390 Asynchronous must
satisfy the following equation:
License capacity of TC390 greater than or equal to the License capacity of TC390 Asynchronous
• TC390 option(s) enabled on the XP12000/XP10000 and on the XP Command View Advanced Edition
Software server or XP Remote Web Console (see ” Installing the TrueCopy software ” on page 53).
Requirements and restrictions
TC390 has the following requirements and restrictions:
• Track format
• One-to-one volume copy operations
• Duplicate VOLSER (Volume Serial Number)
• Logical volume image (LVI) (also called device emulation or device type)
• Accessing TC390 M-VOLs and R-VOLs
• Cache, NVS, and DASD fast write
• Consistency groups
Track format
TC390 has the following disk track format requirements that the user must follow. TC390 cannot detect
exceptions to these requirements. The MCU will abort the TC390 initial copy operation if the track format
for both the M-VOL and R-VOL does not meet the following requirements:
• The TC390 M-VOL and R-VOL must have the same track format.
• Record zero (R0) must be standard format, with key length of zero and data length of eight. The MCU
will abort the initial copy operation if R0 is not standard format.
• The CCHH (logical cylinder address and logical head address) of R0 must be identical to the physical
cylinder address and physical head address of the track.
• The CCHH of each user record in a track must be unique.
One-to-one volume copy operations
TC390 requires a one-to-one relationship between the logical volumes of the volume pairs. A volume can
be assigned only to one TC390 pair at a time. TC390 does not support operations in which one M-VOL is
copied to more than one R-VOL, or more than one M-VOL is copied to one R-VOL. Because TC390 pairs
are created on logical volumes rather than datasets, multivolume datasets require special attention. For
complete duplication and recovery of multivolume datasets, verify that all volumes of a multivolume dataset
are copied to TC390 R-VOLs and use TC390A to ensure update sequence consistency across the R-VOLs at
the remote site.
Duplicate VOLSER
The TC390 initial copy operation always copies the VOLSER of the M-VOL to the R-VOL, even if the No
Copy initial copy option is selected. For this reason, the M-VOL and R-VOL of a TC390 pair must have the
same VOLSER. Because the host operating system does not allow duplicate VOLSERs, the host system
administrator must take precautions to prevent system problems related to duplicate VOLSERs. For example,
the TC390 R-VOLs must be defined in the system generation so they do not come online automatically.