LVM resizing advice needed

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LEARN ABOUT CENTOS

vgscan

VGSCAN(8)						      System Manager's Manual							 VGSCAN(8)

NAME

       vgscan - scan all disks for volume groups and rebuild caches

SYNOPSIS

       vgscan [-d|--debug] [-h|-?|--help] [--ignorelockingfailure] [--mknodes] [-P|--partial] [-v|--verbose]

DESCRIPTION

       vgscan  scans all SCSI, (E)IDE disks, multiple devices and a bunch of other disk devices in the system looking for LVM physical volumes and
       volume groups.  Define a filter in lvm.conf(5) to restrict the scan to avoid a CD ROM, for example.

       In LVM2, vgscans take place automatically; but you might still need to run one explicitly after changing hardware.

OPTIONS

       See lvm(8) for common options.

       --mknodes
	      Also checks the LVM special files in /dev that are needed for active logical volumes and creates any missing ones and removes unused
	      ones.

       --cache
	      Scan devices for LVM physical volumes and volume groups and instruct the lvmetad daemon to update its cached state accordingly.

SEE ALSO

       lvm(8), vgcreate(8), vgchange(8)

Sistina Software UK				     LVM TOOLS 2.02.105(2)-RHEL7 (2014-03-26)						 VGSCAN(8)

Filesystems, Disks and Memory