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Diffstat (limited to 'man/pvscan.8_des')
| -rw-r--r-- | man/pvscan.8_des | 63 |
1 files changed, 27 insertions, 36 deletions
diff --git a/man/pvscan.8_des b/man/pvscan.8_des index b20b987da..4c5929955 100644 --- a/man/pvscan.8_des +++ b/man/pvscan.8_des @@ -4,56 +4,47 @@ like or .BR pvdisplay (8). .P -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 activate LVs. -.P -The four main variations of this are: +When --cache is used, pvscan updates runtime lvm state on the system, or +with -aay performs autoactivation. .P .B pvscan --cache .I device .P -If device is present, lvm adds a record that the PV on device is online. +If device is present, lvm records 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 only reads the named device. .P -.B pvscan --cache -aay -.IR device ... +.B pvscan --cache .P -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.) +Updates the runtime state for all lvm devices. .P -.B pvscan --cache +.B pvscan --cache -aay +.I device .P -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. +Performs the --cache steps for the device, then checks if the VG using the +device is complete. If so, LVs in the VG are autoactivated, the same as +vgchange -aay vgname would do. (A device name may be replaced with major +and minor numbers.) .P .B pvscan --cache -aay .P -This begins by performing the same steps as pvscan --cache. Afterward, it -activates LVs in any complete VGs. +Performs the --cache steps for all devices, then autoactivates any complete VGs. .P -To prevent devices from being scanned by pvscan --cache, add them -to -.BR lvm.conf (5) -.B devices/global_filter. -For more information, see: -.br -.B lvmconfig --withcomments devices/global_filter +.B pvscan --cache --listvg|--listlvs +.I device +.P +Performs the --cache steps for the device, then prints the name of the VG +using the device, or the names of LVs using the device. --checkcomplete +is usually included to check if all PVs for the VG or LVs are online. +When this command is called by a udev rule, the output must conform to +udev rule specifications (see --udevoutput.) The udev rule will use the +results to perform autoactivation. .P -Auto-activation of VGs or LVs can be enabled/disabled using: -.br +Autoactivation of VGs or LVs can be enabled/disabled using vgchange or +lvchange with --setautoactivation y|n, or by adding names to .BR lvm.conf (5) .B activation/auto_activation_volume_list .P -For more information, see: -.br -.B lvmconfig --withcomments activation/auto_activation_volume_list -.P -To disable auto-activation, explicitly set this list to an empty list, -i.e. auto_activation_volume_list = [ ]. -.P -When this setting is undefined (e.g. commented), then all LVs are -auto-activated. +See +.BR lvmautoactivation (7) +for more information about how pvscan is used for autoactivation. |