Mode 745 = OFF:
(1) The area where the information is obtained as the
Characteristic1 item from SYMMTRIX is set to the default.
(2) When CheckPaths or Device Health Check (1/hour) is
performed, the information of an already-mapped external
volume is updated to the default.
Notes:
1. This option is applied when the SYMMETRIX of EMC is
connected using UVM.
2. Enable the setting of EMC SCSI Flag SC3 for the port of
the SYMMETRIX storage of EMC connected with USP V/VM
and disable the setting of Flag SPC2. If the setting of EMC
SCSI Flag SC3 is not enabled or the setting of Flag SPC2 is
enabled, the effect of this mode may not be achieved.
3. If you want to enable this mode immediately after
setting, perform Check Paths on each path one by one for
all the external ports connected to the SYMMETRIX storage
of EMC. But, without doing Check Paths, the display of
Characteristic1 can automatically be changed by the Device
Health Check to be performed once an hour. If SSB=AD02
occurs and a path is blocked, perform Check Paths on this
path again.
4. If the Check Paths is performed while ShadowImage for
z/OS pair and FlashCopy Mirror pair are defined in the
specified volume, the Check Paths operation is rejected with
a message, “605 2518”. If ShadowImage for z/OS pair and
FlashCopy Mirror pair are defined in the specified volume,
do not perform Check Paths but wait until the display is
automatically changed.
749
This mode disables the DP Rebalance function and the DT
Tier relocation function which allow the HDDs of all ECC
Groups in the pool to share the load.
Mode 749 = ON:
The DP Rebalance function and the DT Tier relocation
functions are disabled.
Mode 749 = OFF:
The DP Rebalance function and the DT Tier relocation
functions are activated.
Notes:
1. This option is applied when no change in performance
characteristic is desired.
2. When a pool is newly installed, the load may be
concentrated on the installed pool volumes.
3. When 0 data discarding is executed, load may be
unbalanced among pool volumes.
4. Pool VOL deletion while the mode is set to ON fails. To
delete pool VOLs, set the mode to OFF.
OFF
66
System option modes
Hitachi Virtual Storage Platform G400, G600 Hardware Reference Guide
Summary of Contents for Virtual Storage Platform G400
Page 1: ...Hitachi Virtual Storage Platform G600 Hardware Reference Guide MK 94HM8022 05 June 2016 G400 ...
Page 6: ...6 Hitachi Virtual Storage Platform G400 G600 Hardware Reference Guide ...
Page 16: ...16 Preface Hitachi Virtual Storage Platform G400 G600 Hardware Reference Guide ...
Page 123: ...Hitachi Virtual Storage Platform G400 G600 Hardware Reference Guide ...