EMCMD <system> CHANGEMIRRORTYPE <volume letter> <remote ip> <A/S>
This command is used to change the mirror type of a mirror that is part of a DataKeeper job.
Refer to the examples below.
See Synchronous and Asynchronous Mirroring for information about the supported DataKeeper mirror types.
| <system> | The source or target system on which to initiate the changing of the mirror type. |
| <volume letter> | The drive letter of the mirror to be changed. |
| <remote IP> | The IP address of the remote system. |
| <A/S> | The new mirror type (Asynchronous or Synchronous). |
Notes:
- A job may contain multiple volumes and multiple mirrors. The CHANGEMIRRORTYPE command will modify the type of one mirror each time it is used.
- The mirror type of an existing mirror can be changed while the mirror is in the active Mirroring state. The type change takes effect immediately.
- The mirror type of non-existing mirrors can be changed. See the 1×1×1 example below.
- The mirror type of a mirror that is in the Split-Brain state cannot be changed – the Split Brain must be resolved first.
- If a job contains multiple mirrors, individual mirror types can be modified. Having mixed mirror types within a job, and within the mirrors for an individual volume in the job, is supported.
1×1 Mirror CHANGEMIRRORTYPE Command Example
emcmd SYS1.MYDOM.LOCAL getJobInfoForVol D
ID = caa97f9f-ac6a-4b56-8f25-20db9e2808a8
Name = Mirr Vol D
Description = Mirror Volume D
MirrorEndPoints = SYS3.MYDOM.LOCAL;D;172.17.103.223;SYS1.MYDOM.LOCAL;E;172.17.103.221;A
emcmd SYS1.MYDOM.LOCAL ChangeMirrorType D 172.17.103.223 S
The above example changes the mirror of D: between SYS1 and SYS3 to Synchronous.
1×1×1 Mirror CHANGEMIRRORTYPE Command Example
emcmd SYS1.MYDOM.LOCAL getJobInfoForVol J
ID caa97f93j-ac6a-4b56-8f25-20db9j2808a8
Name = Mirr Vol J
Description = Mirror Volume J
MirrorEndPoints = SYS1.MYDOM.LOCAL;J;172.17.103.221;SYS2.MYDOM.LOCAL;J;172.17.103.222;A
MirrorEndPoints = SYS1.MYDOM.LOCAL;J;172.17.103.221;SYS3.MYDOM.LOCAL;J;172.17.103.223;A
MirrorEndPoints = SYS3.MYDOM.LOCAL;J;172.17.103.223;SYS2.MYDOM.LOCAL;J;172.17.103.222;A
emcmd SYS1.MYDOM.LOCAL GetMirrorVolInfo J
J: 1 SYS1.MYDOM.LOCAL 172.17.103.222 1
J: 1 SYS1.MYDOM.LOCAL 172.17.103.223 1
emcmd SYS1.MYDOM.LOCAL ChangeMirrorType J 172.17.103.222 S
emcmd SYS1.MYDOM.LOCAL ChangeMirrorType J 172.17.103.223 S
emcmd SYS2.MYDOM.LOCAL ChangeMirrorType J 172.17.103.223 S
In this example, all mirror types will be changed to Synchronous. The third command changes the mirror type of the non-existing mirror between SYS2 and SYS3.
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