Ubuntu Manpage: lvscan - List all logical volumes in all volume groups

Provided by: lvm2_2.02.176-4.1ubuntu3.18.04.3_amd64

NAME

       lvscan - List all logical volumes in all volume groups

SYNOPSIS

       lvscan option_args
           [ option_args ]
           [ position_args ]

DESCRIPTION

       lvscan scans all VGs or all supported LVM block devices in the system for LVs. The output consists of one
       line for each LV indicating whether or not it is active, a snapshot or origin, the size of the device and
       its allocation policy. Use lvs(8) or lvdisplay(8) to obtain more comprehensive information about LVs.

USAGE

       lvscan
           [ -a|--all ]
           [ COMMON_OPTIONS ]

       lvscan --cache
           [ COMMON_OPTIONS ]
           [ LV ... ]

       Common options for command:
           [ -b|--blockdevice ]
           [    --ignorelockingfailure ]
           [    --readonly ]
           [    --reportformat basic|json ]

       Common options for lvm:
           [ -d|--debug ]
           [ -h|--help ]
           [ -q|--quiet ]
           [ -t|--test ]
           [ -v|--verbose ]
           [ -y|--yes ]
           [    --commandprofile String ]
           [    --config String ]
           [    --driverloaded y|n ]
           [    --longhelp ]
           [    --profile String ]
           [    --version ]

OPTIONS

-a|--all
Show information about internal LVs. These are components of normal LVs, such as mirrors, which
are not independently accessible, e.g. not mountable.

-b|--blockdevice
No longer used.

--cache
Scan the devices used by an LV and send the metadata to lvmetad.

--commandprofile String
The command profile to use for command configuration. See lvm.conf(5) for more information about
profiles.

--config String
Config settings for the command. These override lvm.conf settings. The String arg uses the same
format as lvm.conf, or may use section/field syntax. See lvm.conf(5) for more information about
config.

-d|--debug ...
Set debug level. Repeat from 1 to 6 times to increase the detail of messages sent to the log file
and/or syslog (if configured).

--driverloaded y|n
If set to no, the command will not attempt to use device-mapper. For testing and debugging.

-h|--help
Display help text.

--ignorelockingfailure
Allows a command to continue with read-only metadata operations after locking failures.

--longhelp
Display long help text.

--profile String
An alias for --commandprofile or --metadataprofile, depending on the command.

-q|--quiet ...
Suppress output and log messages. Overrides --debug and --verbose. Repeat once to also suppress
any prompts with answer 'no'.

--readonly
Run the command in a special read-only mode which will read on-disk metadata without needing to
take any locks. This can be used to peek inside metadata used by a virtual machine image while the
virtual machine is running. It can also be used to peek inside the metadata of clustered VGs when
clustered locking is not configured or running. No attempt will be made to communicate with the
device-mapper kernel driver, so this option is unable to report whether or not LVs are actually in
use.

--reportformat basic|json
Overrides current output format for reports which is defined globally by the report/output_format
setting in lvm.conf. basic is the original format with columns and rows. If there is more than
one report per command, each report is prefixed with the report name for identification. json
produces report output in JSON format. See lvmreport(7) for more information.

-t|--test
Run in test mode. Commands will not update metadata. This is implemented by disabling all
metadata writing but nevertheless returning success to the calling function. This may lead to
unusual error messages in multi-stage operations if a tool relies on reading back metadata it
believes has changed but hasn't.

-v|--verbose ...
Set verbose level. Repeat from 1 to 4 times to increase the detail of messages sent to stdout and
stderr.

--version
Display version information.

-y|--yes
Do not prompt for confirmation interactively but always assume the answer yes. Use with extreme
caution. (For automatic no, see -qq.)

VARIABLES


       LV
              Logical  Volume name.  See lvm(8) for valid names.  An LV positional arg generally includes the VG
              name and LV name, e.g. VG/LV.

       String
              See the option description for information about the string content.

       Size[UNIT]
              Size is an input number that accepts an optional unit.  Input units are always treated as base two
              values, regardless of capitalization, e.g. 'k' and 'K' both refer to 1024.  The default input unit
              is specified  by  letter,  followed  by  |UNIT.   UNIT  represents  other  possible  input  units:
              bBsSkKmMgGtTpPeE.   b|B is bytes, s|S is sectors of 512 bytes, k|K is kilobytes, m|M is megabytes,
              g|G is gigabytes, t|T is terabytes, p|P is petabytes,  e|E  is  exabytes.   (This  should  not  be
              confused with the output control --units, where capital letters mean multiple of 1000.)

ENVIRONMENT VARIABLES

       See  lvm(8)  for  information  about  environment  variables  used  by lvm.  For example, LVM_VG_NAME can
       generally be substituted for a required VG parameter.