H3C V7路由器升级软件时提示无足够存储空间

故障现象

近日，对一些H3C V7路由器进行系统软件升级时，按以往的操作上传ipe文件后直接升级，但升级失败，出现如下错误提示：

<RT01>boot-loader file flash:/MSR830EI-CMW710-R6749P43.ipe main

Verifying the file flash:/MSR830EI-CMW710-R6749P43.ipe on the device............Done.

H3C MSR830 images in IPE:

msr830ei-cmw710-boot-r6749p43.bin

msr830ei-cmw710-system-r6749p43.bin

msr830ei-cmw710-wifidog-r6749p43.bin

msr830ei-cmw710-wwd-r6749p43.bin

msr830ei-cmw710-security-r6749p43.bin

msr830ei-cmw710-voice-r6749p43.bin

msr830ei-cmw710-data-r6749p43.bin

This command will set the main startup software images. Please do not reboot the device during the upgrade. Continue? $Y/N$ :y

Add images to the device.
No sufficient storage space on the device.

无论是从WEB还是CLI，都无法正常完成升级。

故障原因及解决方法

究其原因，这批遇到问题的路由器，都是使用256MB小容量闪存的设备。因为最新版本的系统软件（7.1.0 R6749P43）体积太大，即使彻底删除了闪存上旧版系统软件，也无法将ipe文件全部解压的闪存空间。

H3C提供的升级包中，除了打包好的ipe文件外，也提供全部独立的bin文件。因此可以采取变通的方法，将这些bin文件分别上传至路由器的闪存，并用命令依次指定这些bin文件的用途。命令如下：

<RT01>boot-loader file boot ++flash:/msr830ei-cmw710-boot-r6749p43.bin++ system ++flash:/msr830ei-cmw710-system-r6749p43.bin++ feature ++flash:/msr
830ei-cmw710-data-r6749p43.bin++ ++flash:/msr830ei-cmw710-security-r6749p43.bin++ ++flash:/msr830ei-cmw710-voice-r6749p43.bin++ ++flash:/msr830ei-cmw710-wifidog
-r6749p43.bin++ ++flash:/msr830ei-cmw710-wwd-r6749p43.bin++ main

This command will set the main startup software images. Please do not reboot the device during the upgrade. Continue? $Y/N$ :y

Verifying the file flash:/msr830ei-cmw710-data-r6749p43.bin on the device...Done.

Verifying the file flash:/msr830ei-cmw710-security-r6749p43.bin on the device...Done.

Verifying the file flash:/msr830ei-cmw710-voice-r6749p43.bin on the device...Done.

Verifying the file flash:/msr830ei-cmw710-wifidog-r6749p43.bin on the device...Done.

Verifying the file flash:/msr830ei-cmw710-wwd-r6749p43.bin on the device...Done.

Verifying the file flash:/msr830ei-cmw710-boot-r6749p43.bin on the device...Done.

Verifying the file flash:/msr830ei-cmw710-system-r6749p43.bin on the device..........Done.

The images that have passed all examinations will be used as the main startup software images at the next reboot on the device.