Authentication is required for logical volume not present in fstab

Hello,

I have tumbleweed installed with the current updates: X86-64, kde
The system is a HP proliant with a hardware raid unit and the disks are divided in 3 logical disks

#fdisk -l
Disk /dev/sdb: 300 GiB, 322122547200 bytes, 629145600 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 262144 bytes / 786432 bytes
Disklabel type: dos
Disk identifier: 0x0005f844

Device     Boot     Start       End   Sectors  Size Id Type
/dev/sdb1            1536 209713151 209711616  100G 83 Linux
/dev/sdb2       209713152 419424767 209711616  100G 83 Linux
/dev/sdb3       419424768 524281343 104856576   50G 83 Linux
/dev/sdb4       524281344 629145599 104864256   50G 83 Linux

Disk /dev/sdc: 238.1 GiB, 255651102720 bytes, 499318560 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 262144 bytes / 786432 bytes
Disklabel type: dos
Disk identifier: 0x0001a1e7

Device     Boot    Start       End   Sectors   Size Id Type
/dev/sdc1           1536  41945087  41943552    20G 83 Linux
/dev/sdc2       41945088  50331647   8386560     4G 82 Linux swap / Solaris
/dev/sdc3       50331648  92276735  41945088    20G 83 Linux
/dev/sdc4       92276736 499318271 407041536 194.1G 83 Linux

Disk /dev/sda: 300 GiB, 322122547200 bytes, 629145600 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 262144 bytes / 786432 bytes
Disklabel type: dos
Disk identifier: 0x000aab75

Device     Boot     Start       End   Sectors  Size Id Type
/dev/sda1            1536  25173503  25171968   12G 82 Linux swap / Solaris
/dev/sda2  *     25173504  67120127  41946624   20G 83 Linux
/dev/sda3        67120128 276831743 209711616  100G 83 Linux
/dev/sda4       276831744 629145599 352313856  168G 83 Linux

the mounted files systems are:

Filesystem     1K-blocks     Used Available Use% Mounted on
/dev/sda2       20510716  1587400  17858360   9% /
devtmpfs         5935088        0   5935088   0% /dev
tmpfs            6127716     2312   6125404   1% /dev/shm
tmpfs            6127716    10612   6117104   1% /run
tmpfs            6127716        0   6127716   0% /sys/fs/cgroup
/dev/sda3      103079456  9838724  87981560  11% /usr
/dev/sdb1      103079456 17439128  80381156  18% /srv
/dev/sdb3       51474556 22856700  25980060  47% /local
/dev/sdb4       51477944   147956  48692000   1% /opt
/dev/sda4      173261872 26145100 138292544  16% /home
/dev/sdb2      103079456  2867992  94952292   3% /var

the disk sdc is used as the filesystem for a XEN VM;
sdc1 = root
sdc2 = swap
sdc3 = usr
sdc4 = home

Now the VM is NOT started and I receive a popup window message asking for root password
“Authentication is required to mount HP LOGICAL VOLUME (dev/sdc4)”
If I look at the details I see

Action: mount a filesystem on a system device
Vendor: the udisks project
polkit subject-pid :   2313
polkit.caller-pid : 20086

ps -ef | grep 2313
philippe  2313     1  0 Jan30 ?        00:00:24 kdeinit4: kded4 kdeinit

ps -ef | grep 20086
root     20086     1  0 09:06 ?        00:00:45 /usr/lib/udisks2/udisksd --no-debug

my etc/fstab is

cat fstab
/dev/disk/by-id/scsi-3600508b1001c99233458581ffb65cc88-part2    /       ext4    acl,user_xattr 1 1 
LABEL=usr       /usr    ext4    acl,user_xattr 1 2 
LABEL=home      /home   ext4    acl,user_xattr 1 2 
LABEL=srv       /srv    ext4    acl,user_xattr 1 2 
LABEL=var       /var    ext4    acl,user_xattr 1 2 
LABEL=local     /local  ext4    acl,user_xattr 1 2 
LABEL=opt       /opt    ext4    acl,user_xattr 1 2 
/dev/disk/by-id/scsi-3600508b1001c99233458581ffb65cc88-part1    swap    swap    defaults 0 0 

This popup didn’t occur before this week.
if I enter the root password then the df output changes

df -k
Filesystem     1K-blocks     Used Available Use% Mounted on
/dev/sda2       20510716  1587400  17858360   9% /
devtmpfs         5935088        0   5935088   0% /dev
tmpfs            6127716     2224   6125492   1% /dev/shm
tmpfs            6127716    10624   6117092   1% /run
tmpfs            6127716        0   6127716   0% /sys/fs/cgroup
/dev/sda3      103079456  9838724  87981560  11% /usr
/dev/sdb1      103079456 17439128  80381156  18% /srv
/dev/sdb3       51474556 22856700  25980060  47% /local
/dev/sdb4       51477944   147956  48692000   1% /opt
/dev/sda4      173261872 26158960 138278684  16% /home
/dev/sdb2      103079456  2868012  94952272   3% /var
/dev/sdc4      200195888    60684 189942784   1% /run/media/philippe/0ddfdd63-b1a1-446b-8518-119273bdeff8

hpprol2:/run/media/philippe # ls -l
total 4
drwxr-xr-x 3 root root 4096 Jan 31  2014 0ddfdd63-b1a1-446b-8518-119273bdeff8

which seems linked to  /var/run/media/philippe
hpprol2:/var/run/media/philippe # ls -l
total 4
drwxr-xr-x 3 root root 4096 Jan 31  2014 0ddfdd63-b1a1-446b-8518-119273bdeff8

Any idea why kdeinit or udisksd try mounting a partition which is not referred in fstab?

Many thanks in advance
Philippe