HP P9000 RAID Manager Reference Guide (T1610-96037, October 2011)

Figure 7 Pair splitting

The primary volume’s server is automatically detected by the pairsplit command, so the server does

not need to be specified in the pairsplit command parameters. If the -S option (simplex) is used,

the volume pair is deleted, the volumes are returned to the simplex state, and the primary and

secondary volume status is lost. Paired volumes are split as soon as the pairsplit command is issued.

If you want to synchronize the volumes, the pairsplit command must be issued after write I/Os to

the paired volume have completed.

You can create and split Business Copy pairs simultaneously using the -split option of the paircreate

command (see “paircreate” (page 21)).

You can delete pairs by using the -S option of the pairsplit command. When the pairsplit -S command

is issued, the specified Continuous Access Synchronous or Business Copy pair is deleted, and each

volume is changed to SMPL (simplex) mode. If you want to re-establish a pair that has been deleted,

you must use the paircreate command (not pairresync).

Note on Quick Split: If “$HORCC_SPLT=QUICK” environment variable is set (XP24000/XP20000

Disk Array or XP12000 Disk Array/XP10000 Disk Array), the “pairsplit” and “paircreate -split”

operations are performed as Quick Split regardless of the system option mode 122 setting on the

SVP. The $HORCC_SPLT environment variable is ignored by XP1024/XP128 Disk Array.

Syntax

pairsplit {-h | -q | -z | -g <group> | -d <pair Vol>

| -d[g] <raw_device> [MU#] | -FHORC [MU#] | -FMRCF [MU#]

| -d[g] <seq#> <LDEV#> [MU#] | -r | -rw | -S | -R[S][B] | -P | -l

| -nomsg | -C <size> | -E | -fq <mode>}

Options and parameters

Only one pairsplit option (-r, -rw, -S, -R, or -P) can be specified. If more than one option is specified,

only the last option is executed.

DescriptionOption

Displays Help/Usage and version information.-h

Terminates the interactive mode and exits this command.-q

Makes the pairsplit command enter the interactive mode. The -zx option guards performing of the

HORCM in the interactive mode. When this option is specified and detects a HORCM shutdown,

interactive mode terminates.

-z or -zx

OpenVMS cannot use the -zx option.

Specifies the command as [HORC]/[HOMRCF] or [Continuous Access Synchronous]/[Business Copy],

and used when specifying the RAID Manager instance number.

-I [H] [M]

[instance#]

28 Replication commands