1021
The mode can enable or disable the auto-recovery for
external volumes of an EMC storage system.
Mode 0121 = ON
:
An external volume that is blocked due to Not Ready status
can be recovered automatically regardless of the type of
external storage system.
Mode 1021 = OFF (default)
:
An external volume that is blocked due to Not Ready status
might not be recovered automatically depending on the type
of external storage system.
Notes
:
(1) The mode is applied when the auto-recovery of external
volumes that are blocked due to Not Ready status is desired
in UVM connection using an ECM storage system as an
external storage system.
(2) When the mode is set to ON and the connected external
storage system is not in stable status (such as failure and
recovery from failure), a blockage due to Not Ready status
and auto-recovery may occur repeatedly.
OFF
1070
The mode changes the processing for a group operation
with GAD CTG.
Mode 1070 = ON
:
The status change of all pairs in a CTG is performed for 50
msec.
Mode 1070 = OFF (default)
:
The status change of all pairs in a CTG is performed for 1
msec.
Notes
:
(1) The mode is applied when reducing the time to complete
status change of all pairs in a CTG at a group operation
(suspension and resync operation) with the GAD CTG
function. In a system configuration where host I/O
performance is prioritized, do not use the mode because
setting the mode may affect the host I/O performance.
(2)The MP usage rate increases during status change of all
pairs in a CTG. For approximate percentage increase in MP
usage rate, see sheet "System Option Mode 1070".
OFF
1093
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
:
Background unmap cannot work.
Mode 1093 = OFF (default)
:
Background unmap can work.
OFF
System option modes
77
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 ...
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