Kubestr fio command shoiwng no space left on device

[oshi36]

I have been running kubestr fio test on longhorn storage and its giving me the following error.

 ./kubestr fio -s longhorn -z 2G -n longhorn-system
PVC created kubestr-fio-pvc-wmzjg
Pod created kubestr-fio-pod-tmm47
Running FIO test (default-fio) on StorageClass (longhorn) with a PVC of Size (2G)
Elapsed time- 7m34.0287885s
FIO test results:
  Failed while running FIO test.: Error running command:([fio --directory /dataset /etc/fio-config/default-fio --output-format=json]), stderr:(fio: pid=0, err=28/file:filesetup.c:240, func=write, error=No space left on device
fio: pid=0, err=28/file:filesetup.c:240, func=write, error=No space left on device
fio: io_u error on file /dataset/job2.0.0: No space left on device: write offset=1057120256, buflen=4096
fio: io_u error on file /dataset/job2.0.0: No space left on device: write offset=1116774400, buflen=4096
fio: io_u error on file /dataset/job2.0.0: No space left on device: write offset=300843008, buflen=4096
fio: io_u error on file /dataset/job2.0.0: No space left on device: write offset=730841088, buflen=4096
fio: io_u error on file /dataset/job2.0.0: No space left on device: write offset=1765441536, buflen=4096
fio: io_u error on file /dataset/job2.0.0: No space left on device: write offset=203083776, buflen=4096
fio: io_u error on file /dataset/job2.0.0: No space left on device: write offset=1240322048, buflen=4096
fio: io_u error on file /dataset/job2.0.0: No space left on device: write offset=1799188480, buflen=4096
fio: io_u error on file /dataset/job2.0.0: No space left on device: write offset=385572864, buflen=4096
fio: io_u error on file /dataset/job2.0.0: No space left on device: write offset=723423232, buflen=4096

Want to know how can I resolve this.