Reinstall OMV or not, this is the question...

I have installed OMV and other service (FTP, Samba, Bittorrent, MySql,Website, Owncloud, Plex Media Server).

Everything worked without problems until hard disk /dev/sdb/ had a lot of problems.
So I unplugged the hard drive and today I hung up it again to retrieve data inside it.

I have update OMV and all plugins installed and now everything seems to work fine, except:
-1- Plex Media Server (in service page status service is enabled but with red light in execution).
-2- In Storage -> SMART I have this error:

Failed to get configuration (xpath=//services/smart/monitor/device[devicefile=''])
Errore #3003: exception 'OMVException' with message 'Failed to get configuration (xpath=//services/smart/monitor/device[devicefile=''])' in /usr/share/openmediavault/engined/rpc/smart.inc:323 
Stack trace: 
#0 [internal function]: OMVRpcServiceSmart->getDeviceSettings(Array, Array) 
#1 /usr/share/php/openmediavault/rpcservice.inc(125): call_user_func_array(Array, Array) 
#2 /usr/share/openmediavault/engined/rpc/smart.inc(201): OMVRpcServiceAbstract->callMethod('getDeviceSettin...', Array, Array) 
#3 [internal function]: OMVRpcServiceSmart->getList(Array, Array) 
#4 /usr/share/php/openmediavault/rpcservice.inc(125): call_user_func_array(Array, Array) 
#5 /usr/share/php/openmediavault/rpc.inc(62): OMVRpcServiceAbstract->callMethod('getList', Array, Array) 
#6 /usr/sbin/omv-engined(495): OMVRpc::exec('Smart', 'getList', Array, Array, 1) 
#7 {main}

In Logs -> Smart last error are:
Device:/dev/sdb/ [SAT], 1 Offline uncorrectable sectors
Device:/dev/sdb/ [SAT], 1 Currently unreadable (pending) sectors
Device: /dev/disk/by-id/wwn-0x5000c5002b9e84ad [SAT], 1 Offline uncorrectable sectors
Device: /dev/disk/by-id/wwn-0x5000c5002b9e84ad [SAT], 1 Currently unreadable (pending) sectors

Surely the hard drive has problems so I decided to buy a new one.

My question is the following: I have to reinstall OMV again or you can simply plug the new hard disk to the system?
And when I plug the new HD, what I should do to re-enable the services already installed?

Thanks!

UP!