pvchange is a Linux command that is used to modify the attributes of a physical volume. This command is a part of the LVM (Logical Volume Manager) system and is used to manage the physical volumes that make up a logical volume.
Overview
The pvchange command is used to modify the attributes of a physical volume. The command can be used to change the state of a physical volume from active to inactive or vice versa. It can also be used to change the size of a physical volume or to set the physical volume as read-only.
Syntax
The syntax for the pvchange command is as follows:
pvchange [options] [physical volume]
Examples
- To set a physical volume as inactive:
pvchange -a n /dev/sdb1
- To set a physical volume as read-only:
pvchange -x y /dev/sdc1
- To activate a physical volume:
pvchange -a y /dev/sdd1
Options
The following table lists the available options for the pvchange command:
| Option | Description |
|---|---|
| -a | Activate or deactivate a physical volume |
| -x | Set a physical volume as read-only |
| -u | Update metadata on a physical volume |
| -t | Test the changes that would be made |
| -v | Verbose output |
| -h | Display help information |
Troubleshooting tips
- If you receive an error message stating that the physical volume is already in the desired state, check that the correct physical volume was specified.
- If the physical volume is in use by a logical volume, it cannot be deactivated or set as read-only. You will need to remove the logical volume before making changes to the physical volume.
Notes
- The
pvchangecommand should be used with caution as it can have a significant impact on the availability and integrity of data stored on the physical volume. - It is recommended to take a backup of the data on the physical volume before making any changes using the
pvchangecommand.