FIX: data type of state is string not array

Before fix, when some phys existed their status would be overwritten with 'index' number so one would get output like
```bash
# einarc physical list
ID      Model                    Revision       Serial                     Size     State
0:0     ATA WDC WD1003FBYX-0     01.01V02       WD-WCAW33461279       953869.00 MB  0,1
0:1     ATA WDC WD1003FBYX-0     01.01V02       WD-WCAW36018946       953869.00 MB  0,1
0:2     ATA WDC WD1003FBYX-0     01.01V02       WD-WCAW36019154       953869.00 MB  0,1
0:3     ATA WDC WD1003FBYX-0     01.01V02       WD-WCAW33512856       953869.00 MB  0,1
```
Instead
```bash
# einarc physical list
ID      Model                    Revision       Serial                     Size     State
0:0     ATA WDC WD1003FBYX-0     01.01V02       WD-WCAW33461279       953869.00 MB  optimal
0:1     ATA WDC WD1003FBYX-0     01.01V02       WD-WCAW36018946       953869.00 MB  optimal
0:2     ATA WDC WD1003FBYX-0     01.01V02       WD-WCAW36019154       953869.00 MB  optimal
0:3     ATA WDC WD1003FBYX-0     01.01V02       WD-WCAW33512856       953869.00 MB  optimal
```