return setRestoreHeaderFn(oi, InvalidObjectState{Bucket: bucket, Object: object})
		}
		uploadedParts = append(uploadedParts, CompletePart{
			PartNumber: pInfo.PartNumber,
			ETag:       pInfo.ETag,
		})
	}
	_, err = er.CompleteMultipartUpload(ctx, bucket, object, res.UploadID, uploadedParts, ObjectOptions{
		MTime: oi.ModTime,
	})
	return setRestoreHeaderFn(oi, err)
}

	AbortMultipartUpload(ctx context.Context, bucket, object, uploadID string, opts ObjectOptions) error
	CompleteMultipartUpload(ctx context.Context, bucket, object, uploadID string, uploadedParts []CompletePart, opts ObjectOptions) (objInfo ObjectInfo, err error)

	GetDisks(poolIdx, setIdx int) ([]StorageAPI, error) // return the disks belonging to pool and set.