HP XP Continuous Access Software - Manual (Page 173)

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pairsplit
Split a pair
Description
The pairsplit command is used to change the status of a paired volume.
This command puts the pair into either PSUS or SMPL state.
For status change from PAIR to PSUS or PSUS to SMPL: Before these
state changes are made, all changes made to the P-VOL, up to the point
when the command was issued, are written to the S-VOL. If possible the
host system must flash any of the host resident buffer cache before
executing this command.
For status change from PAIR to SMPL: Changes made on the P-VOL, that
are not yet copied to S-VOL will be lost and data consistency on S-VOL
will not be enforced. First, change the status from PAIR to PSUS and then
to SMPL to ensure consistency on S-VOL in order to use data on S-VOL.
After a pair is put into the PSUS state, changes made to the P-VOL are no
longer copied to the S-VOL. However, the changes made to both the
S-VOL and the P-VOL are noted and, when the volumes are
resynchronized, the changed tracks or cylinders (CA) are resynchronized
with the P-VOL. See “pairresync” .
When a pair is put into SMPL state, the pair relationship between the
volumes is broken. Changes made to either volume are not recorded. To get
the volumes back into a pair relationship, the paircreate command must be
used.
This command stops updating the secondary volume while maintaining
pairing status. When this command is issued, read or read/write access to
the secondary volume is enabled and the volume is put into a SSUS state.
This command can be applied to each paired logical volume or each group.
Only one pair splitting argument (–r, –rw, –S, –R, or –P) can be specified.
If several arguments are specified, only the last argument is valid.