Hitachi TrueCopy for IBM z/OS User and Reference Guide (T5211-96001, June 2007)

About TrueCopy for z/OS Operations 2-5
Hitachi Universal Storage Platform V TrueCopy for IBM z/OS User’s Guide
Table 2-2 USP V Modes for TrueCopy for z/OS (continues on the next
page)
Mode Description
20 Enables TCz – R-VOL read-only function (RCU only).
36 TCz Synchronous – Selects function of CRIT=Y(ALL) or CRIT=Y(PATHS).
Mode 36 ON: CRIT=Y(ALL) => equivalent to Fence Level = Data.
Mode 36 OFF: CRIT=Y(PATHS) => equivalent to Fence Level = Status.
93 Graduated delay process for sidefile control:
Mode 93 OFF (default) = strong delay type
Mode 93 ON = soft delay type
Amount of sidefile Strong delay type Soft delay type
threshold – [15-20%] (HWM) 100 ms × 1 time 20 ms × 1 time
threshold – [10-15%] 200 ms × 1 time 40 ms × 1 time
threshold – [5-10%] 300 ms × 1 time 60 ms × 1 time
threshold – [0-5%] 400 ms × 1 time 80 ms × 1 time
threshold or higher 500 ms × permanent 100 ms × permanent
104 TCz CGROUP – Selects storage system default for CGROUP FREEZE option. Applies to 3990 emulation only.
Note: Mode 104 is invalid if the controller emulation is 2105 or 2107. For 2105 or 2107, use the CGROUP
option of CESTPATH.
Mode 104 ON: FREEZE enabled.
Mode 104 OFF (default): FREEZE disabled.
114 TCz – Allows dynamic port mode setting (Initiator/RCU target for fibre-channel) through PPRC CESTPATH
and CDELPATH commands.
Mode 114 ON: Initiator ports will automatically change to RCU target ports. or vice versa.
Mode 114 OFF (default): Initiator ports will not automatically change to RCU target ports, nor vice versa.
Note: For fibre-channel interface, do not use the CESTPATH and CDELPATH commands at the same time as the
SCSI path definition function of LUN Manager. The fibre-channel interface ports need to be configured as initiator ports
or RCU target ports before the CESTPATH and CDELPATH commands are issued.
Note: Even if you set ON for system option mode 114, initiator ports will not automatically change to RCU target ports,
nor vice versa, when these ports are in initiator/external mix mode.
Caution: Before issuing the CESTPATH command, you must make sure that the relevant paths are offline from the
host(s) (e.g., configure the Chipid offline, or deactivate the LPAR, or block the port in the ESCD). If any active logical
paths still exist, the add path operation will fail because the port mode cannot be changed.
118 TCzA – Allows you to select whether to generate SIM when the sidefile of TCzA and CC reaches high-water
mark (HWM = sidefile threshold - 20%. See mode 93). This mode takes effect on the volume to which the
inflow control is set.
Mode 118 ON: Generate SIM.
Mode 118 OFF (default): No SIM generated.
Note: The reported SIM when this mode is ON is reported per CLPR.
190 TCz – Allows you to update the VOLSER and VTOC of the R-VOL while the pair is suspended if both mode 20
and 190 are ON.
308 Allows you to select whether the Remote Copy Path status, SIM218x, will be reported to the host or not.
Mode 308 ON: SIM218x will be reported to the host.
Mode 308 OFF: SIM218x will not be reported to the host.