[Backup Service] [Investigate] Disk I/O Error

{'end': '2021-04-14T06:55:31.038748187-07:00',

 'error': "exit status 1: failed to execute cluster operations: failed to execute bucket operation for bucket 'default': failed to transfer bucket data for bucket 'default': failed to transfer key value data: failed to transfer key value data: failed to close vBucket: failed to commit final chunk data to disk: failed to commit index: failed to commit index transaction: disk I/O error",

 'error_code': 2,

 'node_runs': [{'end': '2021-04-14T06:55:30.962141527-07:00',

                'error': "exit status 1: failed to execute cluster operations: failed to execute bucket operation for bucket 'default': failed to transfer bucket data for bucket 'default': failed to transfer key value data: failed to transfer key value data: failed to close vBucket: failed to commit final chunk data to disk: failed to commit index: failed to commit index transaction: disk I/O error",

                'error_code': 2,

                'node_id': 'd1bb1fcca1c1f2f0d02e38b219bb0d42',

                'out': None,

                'progress': 0.0,

                'start': '2021-04-14T06:52:03.827807188-07:00',

                'status': 'failed'}],

 'start': '2021-04-14T06:52:03.744369647-07:00',

 'status': 'failed',

 'target_cluster': None,

 'task_name': 'task0',

 'type': 'BACKUP'}