RAID1 "conflicting device node" message on startup

I'm dual booting Win8.1 and Ubuntu 14.04 (Gnome Classic). I have RAID1 set up (on Asus Z87-A motherboard) with Win partition, Ubuntu partition, and NTFS partition for data.

On Ubuntu startup, I see messages:

conflicting device node '/dev/mapper/isw_bdjiccgcbg_ARRAY1p6' found, link to '/dev/dm-6' will not be created conflicting device node '/dev/mapper/isw_bdjiccgcbg_ARRAY1p6' found, link to '/dev/dm-6' will not be created

When I start GParted, I get following error messages:

Could not stat device /dev/mapper//dev/sbd: "pdc" and "isw" formats discovered (using isw)! - No such file or directory Could not stat device /dev/mapper//dev/sda: "pdc" and "isw" formats discovered (using isw)! - No such file or directory

However, I have no problems mounting and using NTFS partition. Are those messages something I should worry about?

Solution 1:

Can you tell me what raid configuration you have setup?
In your raid configuration are there indications of which is primary and is one of the drives set as a hot spare drive? I believe a hot spare needs to be set.

Configuring the RAID

Once you have completed your partitioning in the main "Partition Disks" page select "Configure Software RAID"
Select "Yes"
Select "Create new MD drive"
Select RAID type: RAID 0, RAID 1, RAID 5 or RAID 6
Number of devices. RAID 0 and 1 need 2 drives. 3 for RAID 5 and 4 for RAID 6.
Number of spare devices. Enter 0 if you have no spare drive.
select which partitions to use..
Repeat steps 3 to 7 with each pair of partitions you have created.
Filesystem and mount points will need to be specified for each RAID device. By default they are set to "do not use".
Once done, select finish.

See here for complete info info