Hitachi F1500 - Page 174

Mode Category Description Default MCU/RCU
• The data of external volume with data
direct mapping attribute associated with
a deletion target DP-VOL with data direct
mapping attribute will not be used again.
2. When SOM 1083 is set to ON, the data of
external volumes cannot be guaranteed.
3. When DP-VOL deletion is performed without
disconnecting an external volume, the data
of the external volume cannot be
guaranteed.
1091 TrueCopy
Universal
Replicator
Compatible
FlashCopy
®
V2
This mode enables or disables the zHyperWrite function.
When the mode setting is changed to ON or OFF, SCI is
reported to the host and the zHyperWrite function is
enabled or disabled.
Mode 1091 = ON:
The zHyperWrite function is enabled. (ReadFeatureCode
setting for the zHyperWrite function)
Mode 1091 = OFF (default):
The zHyperWrite function is disabled.
Note:
(1) The mode is applied when storage system version
80-04-21-00/00 or higher that supports the zHyperWrite
function is used.
(2) To enable the zHyperWrite function, set the mode to
ON to both MCU and RCU of TCz.
(3) To downgrade the microcode to a version that does not
support the zHyperWrite function, set the mode to OFF
prior to downgrading the microcode.
(4) Even though the mode is set to ON for a storage
system in 3DC configuration, the zHyperWrite function
does not work for volumes in 3DC configuration.
(5) Do not set the mode to ON if SOM474 is set to ON.
(6) Do not set the mode to ON if Preserve Mirror
configuration is created.
(7) Do not set the mode to ON if the TCz Function Switch
12 is set to ON.
(8) To use the zHyperWrite function, a HyperSwap
environment is required.
Inactive
Both
1093 Dynamic
Provisioning
Dynamic Tiering
Hitachi Thin
Image
This mode is used to disable background unmap during
microcode downgrade from a version that supports pool
reduction rate correction to a version that does not support
the function.
Mode 1093 = ON:
Inactive -
174 System option modes
Hitachi Virtual Storage Platform G1000, G1500, and Virtual Storage Platform F1500 Hardware Guide