Hp XP Continuous Access Software Instrukcja Użytkownika Pobierz pdf (Strona 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.

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Hp XP Continuous Access Software Instrukcja Użytkownika Strona 173