AIX migratepv 命令

绝地灬酷狼 2023-10-14 16:38 34阅读 0赞

## migratepv Command ##

Last Updated: 2023-03-24

### Purpose ###

Moves allocated physical partitions from one physical volume to one or more other physical volumes.

### Syntax ###

**migratepv** \[ [\-i][-i] \] \[ [\-l][-l] *LogicalVolume* \] *SourcePhysicalVolume DestinationPhysicalVolume*...

### Description ###

The **migratepv** command moves allocated physical partitions and the data they contain from the *SourcePhysicalVolume* to one or more other physical volumes. To limit the transfer to specific physical volumes, use the names of one or more physical volumes in the *DestinationPhysicalVolume* parameter; otherwise, all the physical volumes in the volume group are available for the transfer. All physical volumes must be within the same volume group. The specified source physical volume cannot be included in the list of *DestinationPhysicalVolume* parameters.Note:

1.  To use this command, you must either have `root` user authority or be a member of the **system** group.
2.  The **migratepv** command is not allowed on a snapshot volume group or a volume group that has a snapshot volume group.
3.  Running this command on a physical volume that has an active, firmware-assisted, dump logical volume temporarily changes the location of the dump device to **/dev/sysdumpnull**. After you have successfully migrated the logical volume, this command calls the following command to set the firmware-assisted, dump logical volume to the original logical volume.
    
        sysdumpdev -P

The allocation of the new physical partitions follows the policies defined for the logical volumes that contain the physical partitions being moved.

When you migrate a physical volume, the boot logical volume must remain intact. Two contiguous physical partitions and the new boot image must be built on the new boot logical volume.

If you specify a logical volume that contains the boot image, the **migratepv -l** command attempts to find enough contiguous partitions on one of the target physical volumes. If the migration is successful, the **migratepv** command prints a message that recommends the user run the [bosboot][] command to indicate a change in the boot device. The attempted migration fails if the **migratepv -l** command is unable to find enough contiguous space to satisfy the request.

Note: All Logical Volume Manager migrate functions work by creating a mirror of the logical volumes involved, then resynchronizing the logical volumes. The original logical volume is then removed. If the **migratepv** command is used to move a logical volume containing the primary dump device, the system will not have an accessible primary dump device during the execution of the command. Therefore, a dump taken during this execution may fail. To avoid this, reassign the primary dump device using the [sysdumpdev][] command or ensure there is a secondary dump device defined before using **migratepv**.

You can use the System Management Interface Tool (SMIT) **smit migratepv** fast path to run this command.

### Flags ###

<table> 
 <thead> 
  <tr> 
   <th> <p>Item</p> </th> 
   <th> <p>Description</p> </th> 
  </tr> 
 </thead> 
 <tbody> 
  <tr> 
   <td><strong>-i</strong></td> 
   <td>Reads the&nbsp;<em>DestinationPhysicalVolume</em>&nbsp;parameter from standard input.</td> 
  </tr> 
  <tr> 
   <td><strong>-l</strong><em>&nbsp;LogicalVolume</em></td> 
   <td>Moves only the physical partitions allocated to the specified logical volume and located on the specified source physical volume.</td> 
  </tr> 
 </tbody> 
</table>

### Examples ###

1.  To move physical partitions from hdisk1 to hdisk6 and hdisk7, enter:
    
        migratepv hdisk1 hdisk6 hdisk7
    
    Physical partitions are moved from one physical volume to two others within the same volume group.
2.  To move physical partitions in logical volume lv02 from hdisk1 to hdisk6, enter:
    
    migratepv [\-l lv02][-l] hdisk1 hdisk6
    
    Only those physical partitions contained in lv02 are moved from one physical volume to another.

### Files ###

<table> 
 <thead> 
  <tr> 
   <th> <p>Item</p> </th> 
   <th> <p>Description</p> </th> 
  </tr> 
 </thead> 
 <tbody> 
  <tr> 
   <td><strong>/usr/sbin</strong></td> 
   <td>Directory where the&nbsp;<strong>migratepv</strong>&nbsp;command resides.</td> 
  </tr> 
  <tr> 
   <td><strong>/tmp</strong></td> 
   <td>Directory where the temporary files are stored while the command is running.</td> 
  </tr> 
 </tbody> 
</table>

[-i]: https://www.ibm.com/docs/en/aix/7.2?topic=m-migratepv-command#migratepv__row-d3e122538
[-l]: https://www.ibm.com/docs/en/aix/7.2?topic=m-migratepv-command#migratepv__row-d3e122547
[bosboot]: https://www.ibm.com/docs/en/ssw_aix_72/b_commands/bosboot.html
[sysdumpdev]: https://www.ibm.com/docs/en/ssw_aix_72/s_commands/sysdumpdev.html