Filesystem error

I got this error after i replace one drive.
Under Filesystem i see one drive with the information n/a but can´t unmount them.

Error #0:
exception 'ErrorException' with message 'Undefined property: stdClass::$total_space' in /var/www/openmediavault/rpc/greyhole.inc:309
Stack trace:
#0 /var/www/openmediavault/rpc/greyhole.inc(309): exception_error_handler(8, 'Undefined prope...', '/var/www/openme...', 309, Array)
#1 [internal function]: GreyholeRpc->getPoolList(0, -1, NULL, NULL)
#2 /usr/share/php/openmediavault/rpc.inc(263): call_user_func_array(Array, Array)
#3 /usr/share/php/openmediavault/rpc.inc(97): OMVRpc::exec('Greyhole', 'getPoolList', Array)
#4 /var/www/openmediavault/rpc.php(43): OMVJsonRpcServer->handle()
#5 {main}

I must only remove the unknow hdd or all?

<fstab>

<!--

<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>ext2|ext3|ext4|xfs|jfs|iso9660|udf</type>

<opts></opts>

<freq>0</freq>

<passno>0|1|2</passno>

</mntent>

-->

<mntent>

<uuid>67b196d7-716d-4dfe-bcc7-c339e0efb670</uuid>

<fsname>6a8f60a1-6022-4f7a-b53c-21260ebb8309</fsname>

<dir>/media/6a8f60a1-6022-4f7a-b53c-21260ebb8309</dir>

<type>ext4</type>

<opts>defaults,acl,user_xattr,noexec,usrjquota=aquota.user,grpjquota=aquota.group,jqfmt=vfsv0</opts>

<freq>0</freq>

<passno>2</passno>

</mntent>

<mntent>

<uuid>05736dd7-89eb-445a-8ef1-b48c4e79b7b1</uuid>

<fsname>39f7996f-66f0-4a5a-9f67-c198b98fbf49</fsname>

<dir>/media/39f7996f-66f0-4a5a-9f67-c198b98fbf49</dir>

<type>ext4</type>

<opts>defaults,acl,user_xattr,noexec,usrjquota=aquota.user,grpjquota=aquota.group,jqfmt=vfsv0</opts>

<freq>0</freq>

<passno>2</passno>

</mntent>

<mntent>

<uuid>ccbc81c7-4a8e-4c5d-8872-7a9c4f334097</uuid>

<fsname>43dcf38b-ade0-4428-a00e-574ee0c31757</fsname>

<dir>/media/43dcf38b-ade0-4428-a00e-574ee0c31757</dir>

<type>ext4</type>

<opts>defaults,acl,user_xattr,noexec,usrjquota=aquota.user,grpjquota=aquota.group,jqfmt=vfsv0</opts>

<freq>0</freq>

<passno>2</passno>

</mntent>

<mntent>

<uuid>a5fce291-9a31-4885-abf4-546534ae3b3a</uuid>

<fsname>/dev/sde1</fsname>

<dir>/media/C6027E6F027E63F9</dir>

<type>ntfs</type>

<opts>defaults</opts>

<freq>0</freq>

<passno>2</passno>

</mntent>

<mntent>

<uuid>a856c968-83bf-4772-894e-3ae83a268043</uuid>

<fsname>/media/6a8f60a1-6022-4f7a-b53c-21260ebb8309/3000</fsname>

<dir>/home/ftp/3000</dir>

<type>none</type>

<opts>bind</opts>

<freq>0</freq>

<passno>0</passno>

</mntent>

<mntent>

<uuid>b4600b8a-bb05-4824-8746-2fd35af0ee5b</uuid>

<fsname>a2dbddb9-856e-4b4e-8aae-c3a89224a8fa</fsname>

<dir>/media/a2dbddb9-856e-4b4e-8aae-c3a89224a8fa</dir>

<type>ext4</type>

<opts>defaults,acl,user_xattr,noexec,usrjquota=aquota.user,grpjquota=aquota.group,jqfmt=vfsv0</opts>

<freq>0</freq>

<passno>2</passno>

</mntent>

</fstab>

Problem is i can´t see what drive in Greyhole is in real.Can i setup a new Greyhole without loosing my old data?I remove the the 3 small drives without data and replace with big one.They other with the data are keep inside

When i remove one harddrive in the config file i get also the error when i reboot the system is there another entry in a other file?

Got it i delete the section with missing hdd.
But it seems that the file balance not work ?
Can i start them from the Terminal?