Linux command
pvck 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
Example
sudo pvck /dev/sdX1 --dump headers
Example
sudo pvck /dev/sdX1 --dump metadata
Example
sudo pvck /dev/sdX1 --dump metadata_all
Search
sudo pvck /dev/sdX1 --dump metadata_search -f path/to/metadata.txt
Example
sudo pvck /dev/sdX1 --dump metadata --settings "mda_num=2"
Repair
sudo pvck /dev/sdX1 --repair -f path/to/metadata_file
Example
sudo pvck /dev/sdX1 --repairtype pv_header
说明
pvck checks and repairs LVM metadata on physical volumes. It can dump on-disk headers and structures (label_header, pv_header, mda_header), examine metadata areas, search for metadata in damaged volumes, and perform repairs using backup metadata files. The --dump option reads and displays metadata without modifying anything. The --repair option writes corrected headers and metadata using a provided backup file. A PV may have up to two metadata areas (front and back), selectable with `--settings "mda_num=2"`. This tool is essential for LVM disaster recovery when physical volume metadata becomes corrupted.
参数
- --dump _type_
- Dump specified type: headers, metadata, metadata_all, metadata_search.
- --repair
- Repair LVM metadata on the physical volume.
- --repairtype _type_
- Specify repair type: pv_header, metadata, label_header.
- -f, --file _file_
- Input/output file for metadata operations.
- --settings _settings_
- Additional settings (e.g., mda_num=2).
- --labelsector _sector_
- Sector number to read the PV label from (0-3, default: 1).
- -d, --debug
- Enable debug output.
- -v, --verbose
- Enable verbose output.
- -y, --yes
- Answer yes to all prompts automatically.
- -t, --test
- Run in test mode without making changes.
FAQ
What is the pvck command used for?
pvck checks and repairs LVM metadata on physical volumes. It can dump on-disk headers and structures (label_header, pv_header, mda_header), examine metadata areas, search for metadata in damaged volumes, and perform repairs using backup metadata files. The --dump option reads and displays metadata without modifying anything. The --repair option writes corrected headers and metadata using a provided backup file. A PV may have up to two metadata areas (front and back), selectable with `--settings "mda_num=2"`. This tool is essential for LVM disaster recovery when physical volume metadata becomes corrupted.
How do I run a basic pvck example?
Run `sudo pvck /dev/sdX1 --dump headers` in a terminal, then adjust file names, paths, flags, or remote targets for your system.
What does --dump _type_ do in pvck?
Dump specified type: headers, metadata, metadata_all, metadata_search.