mongodump: fact.bson: input/output error

We are trying to export 1.5TB database into mongodb. But its fail after 100gb and giving us below error. As we notice root mount point got 100% space. We are using below command:

mongodump -u admin -p xx_admin_db -d xx –host xx.xx.xx.xx –authenticationDatabase admin

2018-06-28T12:20:30.687+0000    [........................]  xx1.fact  14679565/468546715  (3.1%)
2018-06-28T12:20:31.192+0000    [........................]  xx1.fact  14680477/468546715  (3.1%)
2018-06-28T12:20:31.195+0000    Failed: error writing to file: write dump/xx/xxx.bson: input/output error