lvscan

lvscan [options] [LogicalVolume[s]]

-a|--all
    Scan all volume groups for logical volumes.

-b|--background
    Run the scan in the background.

-d|--debug
    Increase debugging output.

-e|--errorwhenempty
    Return an error if no LVs are found.

-h|--help
    Display help text and exit.

-l|--logicalvolume LogicalVolume
    Scan a specific logical volume. Accepts multiple LVs.

-m|--minor Minor
    Use a specific minor number for the logical volume.

-n|--name LogicalVolume
    Scan a logical volume by name.

-o|--options String
    Comma-separated ordered list of columns to display.

-p|--profile ProfileName
    Configuration profile to use.

-q|--quiet
    Suppress output messages.

-r|--readahead ReadAheadSectors
    Set the read ahead sectors of logical volumes.

-s|--stripes Stripes
    Logical volume with a specific stripes number.

-t|--test
    Run in test mode (no actual changes).

-u|--uuid UUID
    Logical volume with a specific UUID.

-v|--verbose
    Increase verbosity.

-y|--yes
    Answer yes to all prompts.

--version
    Display version information and exit.

The lvscan command scans all disks for LVM logical volumes and reports their status. It can be used to activate logical volumes, making them available for use. This is crucial for mounting file systems residing on these volumes. lvscan provides information such as the volume group and logical volume names, sizes, and current state (active or inactive). This tool is invaluable for system administrators managing storage using LVM, allowing them to quickly identify available and active LVs, activate those that need to be, and troubleshoot potential storage issues. It's a read-only operation and doesn't modify volume data, making it safe to use for auditing and monitoring. Use lvscan to detect changes in your logical volume configuration after adding or removing disks, ensuring that LVM correctly recognizes all available resources.

lvscan primarily checks and reports the status of logical volumes. Use the lvchange -ay command to activate all available logical volumes. To activate a specific volume: lvchange -ay /dev/VolumeGroupName/LogicalVolumeName.

If lvscan doesn't find expected logical volumes, verify that the physical volumes are correctly detected using pvscan and that the volume group is active using vgscan. Check for errors in system logs (e.g., /var/log/syslog or /var/log/messages).

lvm(8), pvscan(8), vgscan(8), lvcreate(8), lvchange(8)