Storage Navigator (It indicates “-“ until just before the
completion and at the last it changes to 100%).
689
This option is used to slow down the initial copy and resync
copy operations when the Write Pending rate on RCU
exceeds 60%.
Mode 689 = ON:
The initial copy and resync copy operations are slowed down
when the Write Pending rate on RCU exceeds 60%.
*: From VSP, if the Write Pending rate of CLPR where the
initial copy target secondary volume belongs to is not over
60% but that of MP PCB where the S-VOL belongs to is over
60%, the initial copy operation is slowed down.
Mode 689 = OFF:
The initial copy and resync copy operations are not slowed
down when the Write Pending rate on RCU exceeds 60%
(the same as before).
Notes:
1. This mode can be set online.
2. The micro-programs on both MCU and RCU must support
this mode.
3. This mode should be set per customer’s requests.
4. If the Write Pending status long keeps 60% or more on
RCU, it takes extra time for the initial copy and resync copy
to be completed by making up for the slowed down copy
operation.
5. From VSP, if the Write Pending rate of CLPR where the
initial copy target secondary volume belongs to is not over
60% but that of MP PCB where the S-VOL belongs to is over
60%, the initial copy operation is slowed down.
6. When the mode is applied while an unsupported model
( USP V/VM (earlier than V02), USP/NSC and earlier
models) is connected as MCU, if the Write Pending rate
reaches 60%, pair suspend may occur.
OFF
690
This option is used to prevent Read JNL or JNL Restore when
the Write Pending rate on RCU exceeds 60% as follows:
- When CLPR of JNL-Volume exceeds 60%, Read JNL is
prevented.
- When CLPR of Data (secondary)-Volume exceeds 60%,
JNL Restore is prevented.
Mode 690 = ON:
Read JNL or JNL Restore is prevented when the Write
Pending rate on RCU exceeds 60%.
Mode 690 = OFF:
Read JNL or JNL Restore is not prevented when the Write
Pending rate on RCU exceeds 60% (the same as before).
OFF
System option modes
59
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 ...