Understanding segments command

Elastic Stack Elasticsearch
1

curl 'http://localhost:9200/datavasanth-21-9-2017/_segments?pretty=true'
{
"_shards" : {
"total" : 10,
"successful" : 0,
"failed" : 0
},
"indices" : { }
}
does it mean the data has been marked for delete but index exist?

The above index datavasanth-21-9-2017 is under unassigned shard.

2

this means there are 10 shards but non of them is allocated so we can't tell how many segments are there.