E/S error是什么错误？

用IoBuildDeviceIoControlRequest来创建一个IRP
status = IoCallDriver(DeviceObject, irp);


if (status == STATUS_PENDING)
{
waitStatus = KeWaitForSingleObject(&event, Executive, KernelMode, FALSE, NULL);

if (waitStatus != STATUS_SUCCESS )
dprintf("HookDrv.sys: 等待IP驱动返回时错误.");
}

status = ioStatus.Status;

if(!NT_SUCCESS(status))
dprintf("HookDrv.sys: E/S error with Ip Driver\n");