# Cannot flash BalenaOS onto HP Proliant Server

**URL:** <https://forums.balena.io/t/cannot-flash-balenaos-onto-hp-proliant-server/338075>\
**Category:** Project help\
**Tags:** support\
**Created:** [July 12, 2021, 4:59pm UTC](https://forums.balena.io/t/cannot-flash-balenaos-onto-hp-proliant-server/338075 "2021-07-12T16:59:15Z")\
**Posts on this page:** 1\
**Showing post:** 4

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**Author:** ![felices](https://avatars.discourse-cdn.com/v4/letter/f/9de053/32.png) [@felices](https://forums.balena.io/u/felices)\
**Post date:** [July 12, 2021, 8:37pm UTC](https://forums.balena.io/t/cannot-flash-balenaos-onto-hp-proliant-server/338075/4 "2021-07-12T20:37:34Z")

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Thanks for your reply at [Burning a USB drive with VMware ISO file - #7 by ab77](https://forums.balena.io/t/burning-a-usb-drive-with-vmware-iso-file/5741/7) !

I tried following your instructions, but maybe I’m missing something. I was able to unwrap the payload image, and I put it on a USB. I then booted from an Ubuntu ISO to serve as my server rescue system. I plugged in an additional USB key with the unwrapped balena image.

My server hard drive is the 240GB SSD. It is all free space.

 ![image](https://global.discourse-cdn.com/balena/original/2X/9/94cae1a472e2043df095f3016e8deb5c80517a2d.jpeg)

I then ran the command:

```auto
dd if=/media/ubuntu/usb_with_unwrapped_img/unwrapped_img.img of=/dev/sda bs=4M

```

and rebooted.

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