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Diffstat (limited to 'conf/example.conf.in')
-rw-r--r-- | conf/example.conf.in | 27 |
1 files changed, 26 insertions, 1 deletions
diff --git a/conf/example.conf.in b/conf/example.conf.in index a5eba014a..154f621bc 100644 --- a/conf/example.conf.in +++ b/conf/example.conf.in @@ -201,9 +201,34 @@ devices { multipath_component_detection = 1 # Configuration option devices/md_component_detection. - # Ignore devices that are components of software RAID (md) devices. + # Enable detection and exclusion of MD component devices. + # An MD component device is a block device that MD uses as part + # of a software RAID virtual device. When an LVM PV is created + # on an MD device, LVM must only use the top level MD device as + # the PV, and should ignore the underlying component devices. + # In cases where the MD superblock is located at the end of the + # component devices, it is more difficult for LVM to consistently + # identify an MD component, see the md_component_checks setting. md_component_detection = 1 + # Configuration option devices/md_component_checks. + # The checks LVM should use to detect MD component devices. + # MD component devices are block devices used by MD software RAID. + # + # Accepted values: + # auto + # LVM will skip scanning the end of devices when it has other + # indications that the device is not an MD component. + # start + # LVM will only scan the start of devices for MD superblocks. + # This does not incur extra I/O by LVM. + # full + # LVM will scan the start and end of devices for MD superblocks. + # This requires an extra read at the end of devices. + # + # This configuration option has an automatic default value. + # md_component_checks = "auto" + # Configuration option devices/fw_raid_component_detection. # Ignore devices that are components of firmware RAID devices. # LVM must use an external_device_info_source other than none for this |