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conf: be more clear about wipe_signatures_when_zeroing_new_lvs option in comments

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Peter Rajnoha 2015-02-27 08:53:15 +01:00
parent 0a19238aa3
commit 8bceb1e0bb
1 changed files with 21 additions and 6 deletions
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27
conf/example.conf.in
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@ -330,13 +330,28 @@ allocation {
# to be recognized, it can take more time to complete the signature scan. # to be recognized, it can take more time to complete the signature scan.
use_blkid_wiping = 1 use_blkid_wiping = 1
# Set to 1 to wipe any signatures found on newly-created Logical Volumes # Set to 1 to detect any signatures found on newly-created Logical Volume
# automatically in addition to zeroing of the first KB on the LV # whenever zeroing of the LV is done (zeroing is controlled by -Z/--zero
# (controlled by the -Z/--zero y option). # option and if not specified, zeroing is used by default if possible).
# The command line option -W/--wipesignatures takes precedence over this
# setting.
# The default is to wipe signatures when zeroing.
# #
# While zeroing simply overwrites first 4 KiB of the LV with zeroes without
# doing any signature detection, signature wiping goes beyond that and it
# can detect exact type and position of signature within the whole LV.
# As such, it provides cleaner LV for use after creation as all known
# signatures are wiped so that the LV is not claimed by other tools
# incorrectly by the existence of old signature from any previous use.
# The number of signatures that LVM can detect depends on detection
# code that is selected - see also use_blkid_wiping option.
#
# Wiping of each detected signature must be confirmed.
#
# The default is to wipe signatures when zeroing. The command line
# option -W/--wipesignatures takes precedence over this setting.
#
# Without this option set, signatures on newly-created Logical Volumes
# are never detected and wiped and you always need to use
# -W/--wipesignatures y option directly to enable this feature
# no matter whether zeroing is used or not.
wipe_signatures_when_zeroing_new_lvs = 1 wipe_signatures_when_zeroing_new_lvs = 1
# Set to 1 to guarantee that mirror logs will always be placed on # Set to 1 to guarantee that mirror logs will always be placed on