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Performing Universal Volume Manager Operations
Hitachi Universal Storage Platform V/VM Universal Volume Manager User’s Guide
To turn on the power supply of both storage systems:
1.
Turn on the power supply of the external storage system.
Caution:
Make sure that the power supply of the external storage system
is completely on and then go on to the next step.
2.
Turn on the power supply of the local storage system.
Caution:
Make sure that the power supply of the local storage system is
completely on and then go on to the next step.
3.
Resynchronize all ShadowImage pairs (pairresync operations).
For details on the pairresync operation, see the
ShadowImage User’s
Guide
.
4.
Start the read or write I/O to the local storage system.
All read and write I/Os with fibre channel connections should be started.
Disconnecting External Storage System or Disconnecting
External Volume
The
Disconnect Subsystem
command and the
Disconnect Volume
command allow you to disconnect the external volume. You need to disconnect
the external volume(s), for example, before you turn the power supply off of
the local storage system or the external storage system for maintenance, or
before you delete the external volume mapping.
As you execute the
Disconnect Subsystem
command or the
Disconnect
Volume
command, the acceptance of the host I/O to the mapped external
volume is stopped and all the data in the cache memory is written into the
external volume (all the data is destaged).
The settings of the mapping are preserved, even though the external volume
is disconnected using the
Disconnect Subsystem
command or the
Disconnect Volume
command. Therefore, you can resume using the external
volume as a mapped volume with the former settings, even though once you
have disconnected the external volume.
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Страница 160: ...7 10 Remote Command Devices Hitachi Universal Storage Platform V VM Universal Volume Manager User s Guide ...
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Страница 198: ...C 4 Adjusting Volume Capacities for Pairs Hitachi Universal Storage Platform V VM Universal Volume Manager User s Guide ...
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