Hitachi AMS 2000 Series, Reference Manual

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Performing CCI Operations
1–7
Hitachi AMS 2000 Family Command Control Interface (CCI) Reference Guide
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Creating pairs (paircreate)
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The paircreate command creates a new volume pair from two unpaired
volumes. The paircreate command can create either a paired logical volume
or a group of paired volumes.
The paircreate command allows you to specify the direction (local or
remote) of the pair creation (see Figure 1-1 ). If local (vl [-pvol] option) is
specified, the host issuing the paircreate command has the primary volume.
If remote (vr [-svol] option) is specified, the remote host has the primary
volume (ShadowImage, TrueCopy, TCE).
The –split option of the paircreate command (ShadowImage, SnapShot)
allows you to simultaneously create and split pairs using a single CCI
command. When –split is used, the pair status changes from COPY to PSUS
(instead of PAIR) when the initial copy operation is complete. Table 1-4 lists
and describes the paircreate command parameters and returned values.
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Figure 1-1: Pair Creation
C:\HORCM\etc>pairdisplay -z
pairdisplay[HOMRCF[5]]: -IM
pairdisplay[HOMRCF[5]]: -q
:
Instance number
Command environment
(ShadowImage/SnapShot/Data Retention)
NOTE: Use the paircreate command with caution. The paircreate
command starts the ShadowImage, TrueCopy, TCE initial copy operation,
which overwrites all data on the secondary volume. If the primary and
secondary volumes are not identified correctly, or if the wrong options are
specified (vl (-pvol) instead of -vr (-svol), data will be transferred in the
wrong direction