Hitachi Virtual Storage Platform, Руководство пользователя и справочник

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Hitachi VSP User and Reference Guide
2–24
Functional and Operational Characteristics
573 TrueCopy for
Mainframe
ShadowImage
for Mainframe For the DKU emulation type 2105/2107, specifying
the CASCADE option for the ICKDSF ESTPAIR
command is allowed.
Mode 573 = ON:
The ESTPAIR CASCADE option is allowed.
Mode 573 = OFF (default):
The ESTPAIR CASCADE option is not allowed.
(When specified, the option is rejected.)
Notes:
1. When DKC emulation type is 2105/2107, this
mode is applied in the case where pair creation in
TCz – SIz cascading configuration in the ICKDSF
environment fails with the following message
output.
Message: ICK30111I DEVICE SPECIFIED IS THE
SECONDARY OF A DUPLEX OR PPRC PAIR
2. The CASCADE option can be specified in the TSO
environment also.
3. Although the CASCADE option can be specified
for the ESTPAIR command, the PPRC-XD function is
not supported.
4. Perform thorough pre-check for any influence on
GDPS/PPRC.
5. The SOM must be enabled only when the
CASCADE option is specified for the ESTPAIR
command for the DKC emulation type 2105/2107.
OFF MCU/RCU
The unit
where TCz
and SIz in a
cascading
configuration
use the same
volume
589 Universal
Volume
Manager Turning this option ON changes the frequency of
progress updates when disconnecting an external
volume. of disconnection is changed.
improvement in destaging to the pool by achieving
efficient HDD access.
Mode 589 = ON: For each external volume,
progress is updated only when the progress rate is
100%
Mode 589 = OFF (default): Progress is updated
when the progress rate exceeds the previous level.
Notes:
1. Set this option to ON when disconnecting an
external volume while the specific host IO
operation is online and its performance
requirement is severe.
2. Whether the disconnecting status for each
external volume is progressed or not cannot be
confirmed on Storage Navigator (It indicates “-
“ until just before the completion and at the last
it changes to 100%).
OFF .
Mode Category Description Default MCU/RCU