User guide

System option modes B–3
Hitachi Unified Storage VM Block Module Hardware User Guide
22 Public Regarding the correction copy or the drive copy, in case
ECCs/LRC PINs are set on the track of copy source HDD,
mode 22 can be used to interrupt the copy processing
(default) or to create ECCs/LRC PINs on the track of copy
target HDD to continue the processing.
Mode 22 = ON:
If ECCs/LRC PINs (up to 16) have been set on the track
of copy source HDD, ECCs/LRC PINs (up to 16) will be
created on the track of copy target HDD so that the copy
processing will continue.
If 17 or more ECCs/LRC PINs are created, the
corresponding copy processing will be interrupted.
Mode 22 = OFF (default):
If ECCs/LRC PINs have been set on the track of copy
source HDD, the copy processing will be interrupted.
(first recover ECCs/LRC PINs by using the PIN recovery
flow, and then perform the correction copy or the drive
copy again)
One of the controlling option for correction/drive copy.
OFF -
80 MRCF ShadowImage
In response to the Restore instruction from the host, if
neither Quick nor Normal is specified, the following
operation is performed.
Mode 80 = ON: Normal Restore (Reverse Copy) is
performed.Mode 80 = OFF (default): Quick Restore is
performed.Note.1. This mode is applied when the
specification for Restore of ShadowImage is switched
between Quick (default) and Normal.2. The performance
of Restore differs depending on the Normal or Quick
specification.
OFF -
87 HOMRCF Determines whether NormalCopy or QuickResync, if not
specified, is performed at the execution of pairresync by
CCI.
Mode 87 = ON: QuickResync is performed.
Mode 87 = OFF: NormalCopy is performed.
OFF -
Mode Category Description Default
MCU/
RCU