Hitachi HUS VM - Page 99

Mode Category Description Default
MCU/R
CU
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.
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 -
122 ShadowImage For Split or Resync request from the Mainframe host and
Storage Navigator.
Mode 122 = ON:
By specifying Split or Resync, Steady/Quick Split or
Normal/Quick Resync is respectively executed in
accordance with Normal/Quick setting.
Mode 122 = OFF (default)?
By specifying Split or Resync, Steady/Quick Split or
Normal/Quick Resync is respectively executed in
accordance with the Normal/Quick setting.
For details, see SOM122 sheet.
Note:
1. For HUS VM, this mode is applied to use scripts etc
that are used on RAIrD400 and 450
2. 2 Executing the pairresync command from CCI may
be related to the SOM087 setting.
3. When performing At-Time Split from CCI, Set this
mode to OFF or specify the environment variable
HORCC_SPLT for Quick. Otherwise, Pairsplit may turn
timeout.
4. The mode becomes effective after specifying Split/
Resync following the mode setting. The mode function
OFF -
System option modes
B-3
Hitachi Unified Storage VM Block Module Hardware User Guide