HP XP7 RAID Manager Reference Guide (T1610-96064)

DescriptionOption
-gs <group>: This 's' option is used when specifying a group name for cascading SVOL (defined
in the configuration definition file). The command is executed for the specified group unless the -ds
<pair Vol> option shown below is specified. For XP7, specify the number of which 300,000 is
added to the serial number for <seq#>.
-ds <pair Vol>: The following options can be specified for cascading S-VOL.
-d[g]s <raw_device> [MU#] ...
-d[g]s <seq#> <LDEV#> [MU#]
Continuous Access Synchronous Async and Continuous Access Journal only.-cto <o-time>
[c-time] [r-time]
These options are valid for only Continuous Access Synchronous Async/Continuous Access Journal.
If you specify -cto <o-time> [c-time] [r-time] option on Continuous Access Synchronous Sync, it is
ignored.
o-time:
This option is used when setting offloading timer for controlling inflow of write I/O to the specified
CT group.
For Continuous Access Synchronous Async o-time must be specified within the limits of 255 from
1, in units of sec as value. If this option is not specified, 90 seconds is set as default.
For Continuous Access Journal, o-time cannot be specified. If you want to change the value for
offloading timer, use the raidcom modify journal command. If you do not change the value by
executing the raidcom modify journal command, 60 seconds is set as default.
If o-time=0 is specified, the inflow of write I/O becomes invalid.
If Sidefile quantity is over limit of Sidefile Area then host side Write I/O is waited for enough space
of Sidefile when storing next new write data until this timeout value (1 second to 255 seconds for
Continuous Access Synchronous Async, and 1second to 600 seconds for Continuous Access Journal).
The default timeout values are 90 seconds for Continuous Access Synchronous Async, and 60
seconds for Continuous Access Journal. If the timeout happens with this waiting state, then the pair
state is changed from PAIR to PSUS state of sidefile (Journal) Full, and its host side Write I/O is
continued and Writing data is managed by BITMAP mode.
Therefore o-time timeout value should have less a low value than I/O timeout value of the host
system
[c-time](Continuous Access Synchronous Async only): This option is used when setting Copy Pending
timer to the specified CT group. c-time must be specified within the limits of 15 from 1, in units of
minutes as value. If this option is not specified, then this value is set as below.
• If CT group is created, then sets 5 minutes as default, if not, it is not changed.
[r-time] (Continuous Access Synchronous Async only): This option is used when specifying RCU
Ready timer to the specified CT group. r-time can be set from 1 to 10 minutes. If this option is not
specified, this value is set as follows:
• If CT group is created, then sets 5 minutes as default; if not, it is not changed.
Notes:
These options are invalid when pair-volume is added in CT group.
The propagation and persistence of these parameters are as follows.
For Continuous Access Synchronous Async, these parameters are also forwarded to the SVOL side
with the paircreate command, and are used when SVOL is changed to PVOL. These parameters
are maintained until the pair-volumes are changed to SMPL
For Continuous Access Journal, these parameters are maintained on each journal. Therefore, if you
set the value for offloading timer, execute the raidcom modify journal command on both PVOL and
SVOL side.
Continuous Access Journal only.-nocsus
This option is used to create the suspended journal volumes without copying data in order to make
the delta-resync between DC2 (Sync-SVOL) and DC3 (Continuous Access Journal-SVOL).
Returned values
The paircreate command sets either of the following returned values in exit (), which allows users
to check the execution results using a user program.
paircreate 29