Hitachi AMS 2000 Reference Manual page 34

Table 1-5: Pairsplit Command Parameters (Continued)
Parameter Value
Options (continued) -FMRCF [MU#] or -FBC [MU#]: Forcibly specifies a cascading ShadowImage
or SnapShot volume for specified pair logical volumes in a TrueCopy or TCE
environment (see example in Figure 1-8 on page 1-18). If the -l option is
specified, this option splits a cascading ShadowImage or SnapShot volume on
a local host. If no -l option is specified, this option splits a cascading
ShadowImage or SnapShot volume on a remote host. The target ShadowImage
or SnapShot volume must be a P-VOL and the -E option cannot be specified.
-d[g] <seq#> <LDEV#> [MU#]: Searches a group on the configuration
definition file (local instance) for the specified LDEV, and if the specified LDEV
is in the group, the target volume is executed as the paired logical volume (-d)
or group (-dg). This option is effective without specification of "-g <group>"
option. If the specified LDEV is contained in two or more groups, the command
is executed on the first group. The <seq #> <LDEV #> values can be specified
in hexadecimal (by addition of "0x") or decimal notation.
-r or -rw (for TrueCopy and TCE): Specifies a mode of access to the S-VOL after
paired volumes are split. The -r option (default) allows read-only from the S-
VOL. The -rw option enables read and write access for the S-VOL.
-S: Selects simplex mode (releases the pair). When the pairing direction is
reversed among the hosts (that is, disaster recovery), this mode is established
once, and then the paircreate command is issued. If you want to re-establish a
pair which has been released, you must use the paircreate command (not
pairresync).
-R (for TrueCopy and TCE): Brings the secondary volume into the simplex mode
forcibly. It is issued by the secondary host, if the host possessing the primary
volume is down or has failed.
-RB (for TrueCopy): Backs up the secondary volume forcibly from SSWS into
PSUS (PSUE) (SSUS) mode. This makes it able to back up from the primary
volume if the user wants to back from the secondary host in SSWS state due to
a Link failure of the primary host.
-l: When this command cannot utilize the remote host for host down, this
option enables a pairsplit operation by local host only. The target volume of local
host can be P-VOL or S-VOL.
-nomsg: Suppresses messages to be displayed when this command is
executed. It is used to execute a command from a user program. This option
must be specified at the beginning of a command argument. The command
execution log is not affected by this option.
-C <size>: This option does not affect an operation even if it specified or
omitted.
-fq <mode>: Specify "normal" or "quick" with "-split".
-E (ShadowImage only): Suspends a paired volume forcibly when a failure
occurs. Not normally used.
-ms <Split-Marker> (for ShadowImage and SnapShot only): This option adds
the optional character strings (ASCII code of 31 characters) specified by you to
the S-VOL or the V-VOL as <Split-Marker>.
-mscas <Split-Marker> [MU#] (TCE only): This option splits the V-VOL of
the SnapShot pair cascaded with the S-VOL of the TCE pair by issuing an
instruction (only the group can be specified) to TCE. As to the TCE pair targeted,
its S-VOL must be cascaded with a SnapShot pair with the same "MU#." All the
TCE pairs concerned must be in the PAIR status. All the SnapShot pairs must
be in the PSUS or PAIR status. All the TCE pairs concerned must be in a specified
group within the CTG and must be in the PAIR status only. Also, an optional
character string (with ASCII 31 characters), which is specified by a user, can be
added to the V-VOL as a <Split-Marker>. Incidentally, this option cannot be
used together with the option of -d.
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Performing CCI Operations
Hitachi AMS 2000 Family Command Control Interface (CCI) Reference Guide