User guide

B–4 System option modes
Hitachi Unified Storage VM Block Module Hardware User Guide
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 does not work if it is set during the Split/
Resync operation
OFF -
278 Open Tru64 (Host Mode 07) and OpenVMS (Host Mode 05)
Caution: Host offline: Required
OFF -
292 HRC When mode 114 is on and the host is connected with the
CNT-made FC switch (FC9000 etc.), and is using
TrueCopy S/390 with Open Fibre connection, the Link
Incident Report for the host from the FC switch will be
deterred when switching the CHT port attribute
(including automatic switching when executing
CESTPATH and CDELPATH
Mode292=ON: When switching the port attribute, issue
the OLS (100ms) first, and then reset the Chip.
Mode292=OFF (default): When switching the port
attribute, reset the Chip without issuing the OLS.
OFF Both
448 Universal
Replicator
ON: (Enabled) If the SVP detects a blocked path, the SVP
assumes that an error occurred, and then immediately
splits (suspends) the mirror. OFF: (Disabled) If the SVP
detects a blocked path and the path does not recover
within the specified period of time, the SVP assumes that
an error occurred, and then splits (suspends) the
mirror.Note: The mode 448 setting takes effect only
when mode 449 is set to OFF.
OFF
Mode Category Description Default
MCU/
RCU