Scanning for Block Devices
You can scan for block devices that may be used as physical volumes with the lvmdiskscan command, as shown in the following example.
# lvmdiskscan
/dev/ram0 [ 16.00 MB]
/dev/sda [ 17.15 GB]
/dev/root [ 13.69 GB]
/dev/ram [ 16.00 MB]
/dev/sda1 [ 17.14 GB] LVM physical volume
/dev/VolGroup00/LogVol01 [ 512.00 MB]
/dev/ram2 [ 16.00 MB]
/dev/ram0 [ 16.00 MB]
/dev/sda [ 17.15 GB]
/dev/root [ 13.69 GB]
/dev/ram [ 16.00 MB]
/dev/sda1 [ 17.14 GB] LVM physical volume
/dev/VolGroup00/LogVol01 [ 512.00 MB]
/dev/ram2 [ 16.00 MB]
lvmdiskscan scans all SCSI, (E)IDE disks, multiple devices and a bunch of other block devices in the system looking for LVM physical volumes. The size reported is the real device size. Define a filter in lvm.conf(5) to restrict the scan to avoid a CD ROM, for example.
If run as a user then.
$ lvmdiskscan
WARNING: Running as a non-root user. Functionality may be unavailable.
0 disks
0 partitions
0 LVM physical volume whole disks
0 LVM physical volumes
WARNING: Running as a non-root user. Functionality may be unavailable.
0 disks
0 partitions
0 LVM physical volume whole disks
0 LVM physical volumes
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