34 Chapter
3
Functional and Operational Characteristics
Table 3.5
System Option Modes for ShadowImage - S/390
®
and ShadowImage
Mode Level
Description
and
Usage
80
Optional
ShadowImage Quick Restore function.
ON: 9900 does not perform the ShadowImage Quick Restore function.
OFF:
9900 performs the ShadowImage Quick Restore function.
87
Optional
Quick Resync by CCI (RAID Manager).
ON: 9900 performs ShadowImage quick resync operation for Resync command from CCI.
OFF:
9900 does not perform ShadowImage quick resync operation for Resync command from CCI.
Microcode level: 01-13-18-00/07 and higher.
122
Optional
ShadowImage Quick Split and Quick Resync functions.
ON: 9900 does not perform ShadowImage quick split and quick resync operations.
OFF:
9900 performs ShadowImage quick split and quick resync operations.
Table 3.6
System Option Modes for TrueCopy - S/390
®
Synchronous & Asynchronous (continues on the
next page)
Mode Level
Description
and
Usage
20
Optional
Enables TC390 – R-VOL read-only function (RCU only).
ON: R-VOL read only function is available.
OFF:
R-VOL read only function is not available.
Microcode level: 01-10-00-00/10 and higher.
36
Optional
TC390 Synchronous – Selects function of CRIT=Y(ALL) or CRIT=Y(PATHS).
ON: CRIT=Y(ALL) => equivalent to Fence Level = Data.
OFF:
CRIT=Y(PATHS) => equivalent to Fence Level = Status.
Microcode level: 01-10-00-00/10 and higher.
38
Optional
TC390 – Changes SSB reported against the WRITE I/O to the M-VOL in critical state.
ON: Intervention required.
OFF:
Command rejected (PPRC specification).
Microcode level: 01-10-00-00/10 and higher.
49
Optional
TC390 – Changes reporting of SSIDs in response to CQUERY command (which is limited to four SSIDs).
When 64 LDEVs per SSID are defined, mode 49 must be ON for TC390, GDPS, and P/DAS operations.
When 256 LDEVs per SSID are defined, mode 49 must be OFF.
ON: Report first SSID for all (256) devices in the logical CU.
OFF:
Report SSID specified for each 64 or 256 devices.
Microcode level: 01-10-00-00/10 and higher.
64
Optional
TC390 CGROUP – Defines scope of CGROUP command within the 9900. Must be OFF for GDPS.
ON: All TC390 volumes in this 9900 subsystem.
OFF:
TC390 volumes behind the specified LCU pair (main and remote LCUs).
Microcode level: 01-10-00-00/10 and higher.
Summary of Contents for 9900 Series
Page 1: ...Hitachi Freedom Storage Lightning 9900 User and Reference Guide ...
Page 2: ......
Page 6: ...vi Preface ...
Page 14: ...xiv Contents ...
Page 42: ...28 Chapter 2 Subsystem Architecture and Components ...
Page 132: ...118 Chapter 6 Troubleshooting ...
Page 134: ...120 Appendix A Unit Conversions ...