pvscan(8) - man - phpman

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



NAME
       pvscan - List all physical volumes

SYNOPSIS
       pvscan option_args
           [ option_args ]
           [ position_args ]

DESCRIPTION
       When called without the --cache option, pvscan lists PVs on the system, like pvs(8) or pvdis‐‐
       play(8).

       When the --cache and -aay options are used, pvscan records which PVs  are  available  on  the
       system, and activates LVs in completed VGs.  A VG is complete when pvscan sees that the final
       PV in the VG has appeared.  This is used by event-based system startup (systemd, udev) to ac‐
       tivate LVs.

       The four main variations of this are:

       pvscan --cache device

       If  device  is  present, lvm adds a record that the PV on device is online.  If device is not
       present, lvm removes the online record for the PV.  In most cases, the pvscan will only  read
       the named devices.

       pvscan --cache -aay device...

       This begins by performing the same steps as above.  Afterward, if the VG for the specified PV
       is complete, then pvscan will activate LVs in the VG (the same as vgchange -aay vgname  would
       do.)

       pvscan --cache

       This  first  clears  all  existing  PV  online records, then scans all devices on the system,
       adding PV online records for any PVs that are found.

       pvscan --cache -aay

       This begins by performing the same steps as pvscan --cache.  Afterward, it activates  LVs  in
       any complete VGs.

       To  prevent  devices  from  being  scanned  by  pvscan  --cache,  add them to lvm.conf(5) de‐‐
       vices/global_filter.  For more information, see:
       lvmconfig --withcomments devices/global_filter

       Auto-activation of VGs or LVs can be enabled/disabled using:
       lvm.conf(5) activation/auto_activation_volume_list

       For more information, see:
       lvmconfig --withcomments activation/auto_activation_volume_list

       To disable auto-activation, explicitly set this list to  an  empty  list,  i.e.  auto_activa‐
       tion_volume_list = [ ].

       When this setting is undefined (e.g. commented), then all LVs are auto-activated.


USAGE
       Display PV information.

       pvscan
           [ -e|--exported ]
           [ -n|--novolumegroup ]
           [ -s|--short ]
           [ -u|--uuid ]
           [ COMMON_OPTIONS ]

       Autoactivate a VG when all PVs are online.

       pvscan --cache
           [ -a|--activate ay ]
           [ -j|--major Number ]
           [    --minor Number ]
           [    --noudevsync ]
           [ COMMON_OPTIONS ]
           [ String|PV ... ]

       Common options for command:
           [    --ignorelockingfailure ]
           [    --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 ]
           [    --lockopt String ]
           [    --longhelp ]
           [    --nolocking ]
           [    --profile String ]
           [    --version ]

OPTIONS
       -a|--activate y|n|ay
              Auto-activate LVs in a VG when the PVs scanned have completed the VG.  (Only ay is ap‐
              plicable.)

       --cache
              Scan one or more devices and record that they are online.

       --commandprofile String
              The command profile to use for command configuration.  See lvm.conf(5) for more infor‐
              mation 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 de‐
              bugging.

       -e|--exported
              Only show PVs belonging to exported VGs.

       -h|--help
              Display help text.

       --ignorelockingfailure
              Allows a command to continue with read-only metadata operations after locking fail‐
              ures.

       --lockopt String
              Used to pass options for special cases to lvmlockd.  See lvmlockd(8) for more informa‐
              tion.

       --longhelp
              Display long help text.

       -j|--major Number
              The major number of a device.

       --minor Number
              The minor number of a device.

       --nolocking
              Disable locking.

       --noudevsync
              Disables udev synchronisation. The process will not wait for notification from udev.
              It will continue irrespective of any possible udev processing in the background. Only
              use this if udev is not running or has rules that ignore the devices LVM creates.

       -n|--novolumegroup
              Only show PVs not belonging to any VG.

       --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'.

       --reportformat basic|json
              Overrides current output format for reports which is defined globally by the re‐
              port/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 lvmre‐‐
              port(7) for more information.

       -s|--short
              Short listing format.

       -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 read‐
              ing back metadata it believes has changed but hasn't.

       -u|--uuid
              Show UUIDs in addition to device names.

       -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
       PV
              Physical  Volume  name,  a device path under /dev.  For commands managing physical ex‐
              tents, a PV positional arg generally accepts a suffix indicating a range (or  multiple
              ranges)  of  physical  extents (PEs). When the first PE is omitted, it defaults to the
              start of the device, and when the last PE is omitted it defaults to  end.   Start  and
              end  range  (inclusive):  PV[:PE-PE]...   Start  and  length  range (counting from 0):
              PV[:PE+PE]...

       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 KiB, m|M is MiB, g|G is GiB, t|T is TiB, p|P is PiB, e|E is EiB.   (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.

SEE ALSO
       lvm(8) lvm.conf(5) lvmconfig(8)

       pvchange(8)  pvck(8)  pvcreate(8)  pvdisplay(8) pvmove(8) pvremove(8) pvresize(8) pvs(8) pvs‐‐
       can(8)

       vgcfgbackup(8) vgcfgrestore(8) vgchange(8) vgck(8) vgcreate(8) vgconvert(8) vgdisplay(8)  vg‐‐
       export(8)  vgextend(8) vgimport(8) vgimportclone(8) vgmerge(8) vgmknodes(8) vgreduce(8) vgre‐‐
       move(8) vgrename(8) vgs(8) vgscan(8) vgsplit(8)

       lvcreate(8) lvchange(8) lvconvert(8) lvdisplay(8) lvextend(8) lvreduce(8)  lvremove(8)  lvre‐‐
       name(8) lvresize(8) lvs(8) lvscan(8)

       lvm-fullreport(8) lvm-lvpoll(8) lvm2-activation-generator(8) blkdeactivate(8) lvmdump(8)

       dmeventd(8) lvmpolld(8) lvmlockd(8) lvmlockctl(8) cmirrord(8) lvmdbusd(8)

       lvmsystemid(7) lvmreport(7) lvmraid(7) lvmthin(7) lvmcache(7)



Red Hat, Inc.                     LVM TOOLS 2.03.11(2) (2021-01-08)                        PVSCAN(8)