Hitachi VSP User and Reference Guide
2–14
Functional and Operational Characteristics
305 Mainframe This mode enables the pre-label function (creation
of VTOC including VOLSER).
Mode 305 = ON:
Pre-label function is enabled
Note:
1. Set SOM 305 to ON before performing LDEV
Format for a mainframe volume if you want to
perform OS IPL (volume online) without fully
initializing the volume after the LDEV Format.
However, full initialization is required in actual
operation.
2. Processing time of LDEV format increases by as
much as full initialization takes.
3. The following functions and conditions are not
supported.
Quick format
3390-A (Dynamic Provisioning attribute)
Volume Shredder
4. Full initialization is required in actual operation.
OFF MCU/RCU
308 TrueCopy for
Mainframe
Universal
Replicator for
Mainframe
SIM RC=2180 option
<Description>
SIM RC=2180 (RIO path failure between MCU and
RCU) was not reported to host. DKC reports SSB
with F/M=F5 instead of reporting SIM RC=2180 in
the case. Micro-program has been modified to
report SIM RC=2180 with newly assigned system
option Mode as individual function for specific
customer.
Usage:
Mode 308 = ON
SIM RC 2180 is reported which is compatible with
older Hitachi specification
Mode 308 = OFF
Reporting is compatible with IBM - Sense Status
report of F5.
OFF MCU
448 Universal
Replicator
Universal
Replicator for
Mainframe
Mode 448 = ON: (Enabled)
If the SVP detects a blocked path, the SVP assumes
that an error occurred, and then immediately splits
(suspends) the mirror.
Mode 448 = 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
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