I have the same Problem... 2 entries in the filesystem. What I did before: I unmounted two disks via ssh and formated them.
omv-showkey mntent
Code
<mntent>
<uuid>xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx</uuid>
<fsname>xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx|xxxx-xxxx|/dev/xxx</fsname>
<dir>/xxx/yyy/zzz</dir>
<type>none|ext2|ext3|ext4|xfs|jfs|iso9660|udf|...</type>
<opts></opts>
<freq>0</freq>
<passno>0|1|2</passno>
<hidden>0|1</hidden>
</mntent>
<mntent>
<uuid>09910deb-82f5-4a3e-849e-e0e008bb31d1</uuid>
<fsname>03384bfb-bf5d-494b-a7db-38d7a97458de</fsname>
<dir>/media/03384bfb-bf5d-494b-a7db-38d7a97458de</dir>
<type>ext4</type>
<opts>defaults,nofail,user_xattr,noexec,usrjquota=aquota.user,grpjquota=aquota.group,jqfmt=vfsv0,acl</opts>
<freq>0</freq>
<passno>2</passno>
<hidden>0</hidden>
</mntent>
<mntent>
<uuid>abb8ffd1-408d-4c66-8762-d610130686c6</uuid>
<fsname>39a625ad-3f0a-4f16-8f26-7863ccf49a2c</fsname>
<dir>/media/39a625ad-3f0a-4f16-8f26-7863ccf49a2c</dir>
<type>ext4</type>
<opts>defaults,nofail,user_xattr,noexec,usrjquota=aquota.user,grpjquota=aquota.group,jqfmt=vfsv0,acl</opts>
<freq>0</freq>
<passno>2</passno>
<hidden>0</hidden>
</mntent>blkid
Code
/dev/sdc: UUID="cef5d186-7f75-4137-f845-b30702851f56" UUID_SUB="fe40b0b3-c286-525f-db0c-dddfb5f83b0b" LABEL="NAS01:RAID1M" TYPE="linux_raid_member"
/dev/sde: UUID="cef5d186-7f75-4137-f845-b30702851f56" UUID_SUB="4f55acfa-72cf-bd82-0924-ae5127b0803f" LABEL="NAS01:RAID1M" TYPE="linux_raid_member"
/dev/sdd: UUID="5115689c-8706-2a8c-24c0-7babaf4cfe9a" UUID_SUB="2772b474-ded8-8fd0-ec11-ff2819dfad49" LABEL="NAS01:1" TYPE="linux_raid_member"
/dev/sda1: UUID="7cd9a2ee-c2d6-45d4-84c6-cca47752142c" TYPE="ext4"
/dev/sda5: UUID="8b54ad70-4fe8-4d66-a610-e3ac5270e453" TYPE="swap"
/dev/sdf: UUID="5115689c-8706-2a8c-24c0-7babaf4cfe9a" UUID_SUB="d7a00355-2f2e-4957-aae9-00a32b527665" LABEL="NAS01:1" TYPE="linux_raid_member"
/dev/sdg: UUID="5115689c-8706-2a8c-24c0-7babaf4cfe9a" UUID_SUB="4232a8ab-5363-ac6f-c3cd-c041f02b3403" LABEL="NAS01:1" TYPE="linux_raid_member"