# Booting SLES from a .ISO **URL:** \ **Category:** SUSE Linux Enterprise Server\ **Created:** [May 27, 2024, 6:51am UTC](https://forums.suse.com/t/booting-sles-from-a-iso/43262 "2024-05-27T06:51:14Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![sujeeth\_kamath](https://sea2.discourse-cdn.com/flex022/user_avatar/forums.suse.com/sujeeth_kamath/32/10517_2.png) [@sujeeth\_kamath](https://forums.suse.com/u/sujeeth_kamath)\ **Post date:** [May 27, 2024, 6:51am UTC](https://forums.suse.com/t/booting-sles-from-a-iso/43262/1 "2024-05-27T06:51:14Z")
WE have a SLES server 12 SP4, we want to upgrade it to SLES 12 SP5. Since the server is not in the internet we cannot do a online installation. In addition the server do not have any flash drives either so booting from a .ISO is only option. However we are not seeing any clear documentation on how to do that? Can someone kindly share the steps? ---
**Author:** ![malcolmlewis1](https://sea2.discourse-cdn.com/flex022/user_avatar/forums.suse.com/malcolmlewis1/32/10022_2.png) [@malcolmlewis1](https://forums.suse.com/u/malcolmlewis1)\ **Post date:** [May 27, 2024, 1:24pm UTC](https://forums.suse.com/t/booting-sles-from-a-iso/43262/2 "2024-05-27T13:24:24Z")
@sujeeth_kamath Hi so you have a DVD device in the system? See [https://documentation.suse.com/sles/12-SP5/html/SLES-all/cha-update-offline.html#sec-update-offline-dvd](https://documentation.suse.com/sles/12-SP5/html/SLES-all/cha-update-offline.html#sec-update-offline-dvd) You just need DVD 1 and writeable DVD media to put the image onto with eg Brasero, when burning the image, make sure you use the slowest speed possible as well. ---
**Author:** ![sujeeth\_kamath](https://sea2.discourse-cdn.com/flex022/user_avatar/forums.suse.com/sujeeth_kamath/32/10517_2.png) [@sujeeth\_kamath](https://forums.suse.com/u/sujeeth_kamath)\ **Post date:** [May 28, 2024, 7:42am UTC](https://forums.suse.com/t/booting-sles-from-a-iso/43262/3 "2024-05-28T07:42:12Z")
Thanks a lot Malcom for response. unfortunately the server do not have a DVD drive. We only have the option of booting from the .iso so here is what we are looking for a. Copy the .iso to the server b. **Change the settings so that .iso also show up a booting mechanism - Not sure what are the settings** c. Reboot and go ahead with the update. Any help in this regard is highly appreciated ---
**Author:** ![malcolmlewis1](https://sea2.discourse-cdn.com/flex022/user_avatar/forums.suse.com/malcolmlewis1/32/10022_2.png) [@malcolmlewis1](https://forums.suse.com/u/malcolmlewis1)\ **Post date:** [May 28, 2024, 12:16pm UTC](https://forums.suse.com/t/booting-sles-from-a-iso/43262/4 "2024-05-28T12:16:43Z")
@sujeeth_kamath See this thread about adding the iso image to grub;[https://forums.opensuse.org/t/how-do-i-boot-from-iso/113149](https://forums.opensuse.org/t/how-do-i-boot-from-iso/113149)