diff --git a/conf/example.conf.in b/conf/example.conf.in index 11d92ac2c..1063363f4 100644 --- a/conf/example.conf.in +++ b/conf/example.conf.in @@ -241,17 +241,12 @@ devices { # sysfs_scan = 1 # Configuration option devices/scan_lvs. - # Scan LVM LVs for layered PVs, allowing LVs to be used as PVs. - # When 1, LVM will detect PVs layered on LVs, and caution must be - # taken to avoid a host accessing a layered VG that may not belong - # to it, e.g. from a guest image. This generally requires excluding - # the LVs with device filters. Also, when this setting is enabled, - # every LVM command will scan every active LV on the system (unless - # filtered), which can cause performance problems on systems with - # many active LVs. When this setting is 0, LVM will not detect or - # use PVs that exist on LVs, and will not allow a PV to be created on - # an LV. The LVs are ignored using a built in device filter that - # identifies and excludes LVs. + # Allow LVM LVs to be used as PVs. When enabled, LVM commands will + # scan active LVs to look for other PVs. Caution is required to + # avoid using PVs that belong to guest images stored on LVs. + # When enabled, the LVs scanned should be restricted using the + # devices file or the filter. This option does not enable autoactivation + # of layered VGs, which requires editing LVM udev rules (see LVM_PVSCAN_ON_LVS.) # This configuration option has an automatic default value. # scan_lvs = 0