[Backup Service] [Investigate] Database disk image malformed

2021-04-14T07:18:50.820-07:00 ERRO: (Scanworker) (vb 255) Failed to perform 'FullFileScan': failed to perform full scan: failed to perform full scan on chunk 0 for vBucket 255: failed to determine the offset of the first requested sequence number 0: failed to query offset for sequence number: 0: database disk image is malformed -- archive.scanWorker.func1() at source.go:316

2021-04-14T07:18:50.824-07:00 ERRO: (Scanworker) (vb 348) Failed to open source vBucket: failed to open vBucket 348: failed to open index: failed to query 'user_version': disk I/O error: input/output error -- archive.scanWorker.func1() at source.go:302

2021-04-14T07:18:50.912-07:00 ERRO: (Scanworker) (vb 445) Failed to perform 'FullFileScan': failed to perform full scan: failed to perform full scan on chunk 0 for vBucket 445: failed to determine the offset of the first requested sequence number 0: failed to query offset for sequence number: 0: database disk image is malformed -- archive.scanWorker.func1() at source.go:316

2021-04-14T07:18:50.912-07:00 ERRO: (Scanworker) (vb 730) Failed to perform 'FullFileScan': failed to perform full scan: failed to perform full scan on chunk 0 for vBucket 730: failed to determine the offset of the first requested sequence number 0: failed to query offset for sequence number: 0: database disk image is malformed -- archive.scanWorker.func1() at source.go:316

2021-04-14T07:18:50.917-07:00 ERRO: (Scanworker) (vb 947) Failed to perform 'FullFileScan': failed to perform full scan: failed to perform full scan on chunk 0 for vBucket 947: failed to determine the offset of the first requested sequence number 0: failed to query offset for sequence number: 0: database disk image is malformed -- archive.scanWorker.func1() at source.go:316

2021-04-14T07:18:50.942-07:00 ERRO: (Scanworker) (vb 697) Failed to perform 'FullFileScan': failed to perform full scan: failed to perform full scan on chunk 0 for vBucket 697: failed to determine the offset of the first requested sequence number 0: failed to query offset for sequence number: 0: database disk image is malformed -- archive.scanWorker.func1() at source.go:316

2021-04-14T07:18:50.944-07:00 (Cmd) Error merging data: failed to execute cluster operations: failed to execute bucket operation for bucket 'bucket1': failed to transfer bucket data for bucket 'bucket1': failed to transfer key value data: failed to transfer key value data: failed to perform full scan: failed to perform full scan on chunk 0 for vBucket 255: failed to determine the offset of the first requested sequence number 0: failed to query offset for sequence number: 0: database disk image is malformed