The script /etc/rc.d/rc.sysinit has the following code to initialise LVM. Why
is this necessary? Everything else in /dev can remain safely as it is
between boots, why is LVM unlike everything else in that it requires it's
device node to be re-created, why can't it get allocated a number in
devices.txt?
If the LVM device already exists and has the correct major/minor numbers and
permissions then why does it have to be removed and re-created? Why can't
nash just stat it and exit quietly if there's nothing to do?
# LVM2 initialization
if [ -x /sbin/lvm.static ]; then
if ! LC_ALL=C fgrep -q "device-mapper" /proc/devices 2>/dev/null ; then
modprobe dm-mod >/dev/null 2>&1
fi
/bin/rm -f /dev/mapper/control &> /dev/null
echo "mkdmnod" | /sbin/nash --quiet >/dev/null 2>&1
[ -n "$SELINUX" ] && restorecon /dev/mapper/control
if [ -c /dev/mapper/control -a -x /sbin/lvm.static ]; then
if /sbin/lvm.static vgscan --mknodes --ignorelockingfailure
> /dev/null 2>&1 ; then
action $"Setting up Logical Volume Management:" /sbin/lvm.static
vgchange -a y --ignorelockingfailure
fi
fi
fi
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