Linux command
vgscan 命令
安全
权限或系统影响较大，执行前请核对目标。
常用示例
Scan for all volume groups
sudo vgscan
Scan and recreate missing device nodes
sudo vgscan --mknodes
Scan with verbose output
sudo vgscan -v
Scan in test mode without updating metadata
sudo vgscan -t
说明
vgscan scans all supported LVM block devices in the system for volume groups. It builds the LVM cache file that holds current information about volume groups on the system. On modern LVM2 systems, volume group scans happen automatically when changes are made. Manual use of vgscan is mainly needed after hardware changes or to rebuild the cache.
参数
- --mknodes
- Check and recreate LVM special device files in /dev. Creates missing nodes and removes unused ones.
- -v, --verbose
- Verbose mode. Repeat up to 4 times to increase detail.
- --notifydbus
- Send a notification to D-Bus after the scan completes.
- --reportformat _basic|json_
- Override the output format for reports.
- --ignorelockingfailure
- Continue with read-only metadata operations after locking failures.
- -t, --test
- Run in test mode without updating metadata.
- -d, --debug
- Set debug level. Repeat up to 6 times to increase detail.
- -q, --quiet
- Suppress output and log messages.
FAQ
What is the vgscan command used for?
vgscan scans all supported LVM block devices in the system for volume groups. It builds the LVM cache file that holds current information about volume groups on the system. On modern LVM2 systems, volume group scans happen automatically when changes are made. Manual use of vgscan is mainly needed after hardware changes or to rebuild the cache.
How do I run a basic vgscan example?
Run `sudo vgscan` in a terminal, then adjust file names, paths, flags, or remote targets for your system.
What does --mknodes do in vgscan?
Check and recreate LVM special device files in /dev. Creates missing nodes and removes unused ones.