---
title: 热更新免刷flash故障如何恢复
description: "在hinicadm3的updatefw命令中新增bypass_flash选项以实现免刷flash热更新能力，该能力推荐在开发调试时使用，在上下电后会加载原有固件，通过免刷flash更新的固件会失效。命令详情，可参见《华为SP900 DPU卡 用户指南》(https://support.huawei.com/carrier/idpRedirect?redirect=https%253A%252F%252Fsupport.huawei.com%252Fenterprise%252Fzh%252Fdoc%252FEDOC1100334517%252F85323b42%253FidPath%253D23710424%257C251364417%257C9856629%257C253271089%2523ZH-CN_TOPIC_0000002504074359)中“热升级固件”。"
url: https://www.hikunpeng.com/document/detail/zh/flexda/devguide/dpak_dev0096.html
sourcePath: /source/zh/flexda/devguide/dpak_dev0096.html
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---
# 热更新免刷flash故障如何恢复

在hinicadm3的updatefw命令中新增bypass_flash选项以实现免刷flash热更新能力，该能力推荐在开发调试时使用，在上下电后会加载原有固件，通过免刷flash更新的固件会失效。命令详情，可参见《华为SP900 DPU卡 用户指南》(https://support.huawei.com/carrier/idpRedirect?redirect=https%253A%252F%252Fsupport.huawei.com%252Fenterprise%252Fzh%252Fdoc%252FEDOC1100334517%252F85323b42%253FidPath%253D23710424%257C251364417%257C9856629%257C253271089%2523ZH-CN_TOPIC_0000002504074359)中“热升级固件”。

1. 执行以下命令进行免刷flash热更新。

```
hinicadm3 updatefw -i hinic0 -f
{编译的NPU固件}
-a hot -t bypass_flash
```


  打印信息如下，即表示更新成功。

```
[root@localhost bypass_flash]# hinicadm3 updatefw -i hinic0 -f Hinic3_flash.bin -a hot -t bypass_flash
Version check succeed.
The running version can be hot upgraded to the target version.
Please do not remove driver or network device.
Loading...
Firmware update start: 2025-04-27 15:30:36
[>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>] [100%][\]
Firmware update finish: 2025-04-27 15:30:53
Firmware update time used: 17s
Loading firmware image succeed.
Do not operate the device during the hot upgrade.
NPU firmware (bypass flash) is activing. Please waiting...
Set update hot active successful
```


2. 更新后若出现故障，可以通过上下电恢复为原有固件。