The default setting is different according to models and
versions. For details, see spreadsheet "Default Setting of
Mode 467".
Mode 467 = ON:
The copy processing stops if the dirty percentage is 60% or
larger. If the dirty percentage becomes lower than 60%, the
copy processing restarts.
Mode 467 = OFF:
The copy processing slows down if the dirty percentage is
60% or larger, and it stops if the dirty percentage is 75% or
larger.
Notes:
1. This mode must always be set to ON when using an
external volume as the secondary volume of any of the
above-mentioned PPs for copy.
2. It takes longer to finish the copy processing because it
stops for prioritizing the host I/O performance.
3. This mode supports background copy only. The
processing to copy the pre-update data to the S-VOL, which
occurs when overwriting data to un-copied slots of P-VOL in
Split processing or reading or writing data to un-copied slots
of S-VOL, is not supported.
4. Check the write pending rate of each CLPR per MP blade.
Even though there is some free cache capacity in the entire
system, if the write pending rate of an MP blade where
ShadowImage / ShadowImage for z/OS / FCV2 / Copy-on-
Write Snapshot / Volume Migration pairs belong to exceeds
the threshold, the copy operation is stopped.
471
Since the SIM-RC(*) that are generated when the usage
rate of Pool used by Snapshot exceeds the threshold value
can be resolved by users, basically they are not reported to
the maintenance personnel.
This option is used to inform maintenance personnel of
these SIMs that are basically not reported to maintenance
personnel in case these SIMs must be reported to them.
* SIMs reported by setting the mode to ON are as follows.
- HUS VM:
SIM-RC 601xxx (Pool utilization threshold excess)/ 603000
(SM Space Warning)
Mode 471 = ON:
This kind of SIMs is reported to maintenance personnel.
Mode 471 = OFF:
This kind of SIMs is not reported to maintenance personnel.
Notes:
OFF
56
System option modes
Hitachi Virtual Storage Platform G400, G600 Hardware Reference Guide
Summary of Contents for Virtual Storage Platform G400
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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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