Hitachi Virtual Storage Platform, User And Reference Manual

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Hitachi VSP User and Reference Guide
2–16
Functional and Operational Characteristics
457 Universal
Volume
Manager 1. High Speed LDEV Format for External Volumes
Mode 457 = ON: The high speed LDEV format
for external volumes is available by setting
system option mode 457 to ON. When System
Option Mode 457 is ON, when selecting the
external volume group and performing the
LDEV format, any Write processing on the
external logical units will be skipped. However,
if the emulation type of the external LDEV is a
mainframe system, the Write processing for
mainframe control information only will be
performed after the write skip.
2. Support for Mainframe Control Block Write
GUIMode 457 = ON: The high speed LDEV
format for external volumes is supported.
Control Block Write of the external LDEVs in
Mainframe emulation is supported by Storage
Navigator (GUI).
Notes:
1. If the LDEV is not written with data “0” before
performing the function, the LDEV format may
fail.
2. After the format processing, make sure to set
system option mode 457 to OFF.
OFF MCU/RCU
459 ShadowImage
for Mainframe,
ShadowImage When the secondary volume of an SI/SIz pair is an
external volume, the transaction to change the
status from SP-PEND to SPLIT is as follows:
1. Mode 459 = ON when creating an SI/SIz pair:
The copy data is created in cache memory.
When the write processing on the external
storage completes and the data is fixed, the pair
status will change to SPLIT.
2. Mode 459 = OFF when creating an SI/SIz pair
Once the copy data has been created in cache
memory, the pair status will change to SPLIT.
The external storage data is not fixed (current
spec).
OFF -
464 TrueCopy for
Mainframe SIM Report without Inflow Limit
For TC, the SIM report for the volume without inflow
limit is available when mode 464 is set to ON.
SIM: RC=490x-yy (x=CU#, yy=LDEV#) OFF MCU
Mode Category Description Default MCU/RCU