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[feature request]: "Preserve some space at the end of the disk": Warn that OS installations run from the Ventoy drive cannot be installed on the free disk space on the Ventoy drive #2083

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opened 2026-02-20 18:10:47 -05:00 by deekerman · 2 comments

deekerman commented

2026-02-20 18:10:47 -05:00

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Originally created by @davidhedlund on GitHub (Oct 23, 2023).

Official FAQ

I have checked the official FAQ.

Ventoy Version

1.0.96

What about latest release

Yes. I have tried the latest release, but the bug still exist.

Try alternative boot mode

Yes. I have tried them, but the bug still exist.

BIOS Mode

Legacy BIOS Mode

Partition Style

MBR

Disk Capacity

32GB

Disk Manufacturer

No response

Image file checksum (if applicable)

None

Image file download link (if applicable)

No response

What happened?

Steps to reproduce:

Enable "Preserve some space at the end of the disk"

Could not install Ubuntu GNU/Linux:

https://github.com/ventoy/Ventoy/issues/2595

Is this an OS installation ISO issue, or is it a Ventoy issue? If it's a Ventoy issue, please inform about this.

Inform about this

Something like "The free disk space cannot be used to install an operating systems (OS), if the OS installation ISO is run from Ventoy on the same disk"

In the Ventoy making program

In the documentation

Mention this at https://ventoy.net/en/doc_non_destructive.html

Originally created by @davidhedlund on GitHub (Oct 23, 2023). ### Official FAQ - [X] I have checked the official FAQ. ### Ventoy Version 1.0.96 ### What about latest release Yes. I have tried the latest release, but the bug still exist. ### Try alternative boot mode Yes. I have tried them, but the bug still exist. ### BIOS Mode Legacy BIOS Mode ### Partition Style MBR ### Disk Capacity 32GB ### Disk Manufacturer _No response_ ### Image file checksum (if applicable) None ### Image file download link (if applicable) _No response_ ### What happened? Steps to reproduce: * Enable "Preserve some space at the end of the disk" ![image](https://github.com/ventoy/Ventoy/assets/6416073/1a0d6c31-53ee-450d-ab0d-71883302b851) Could not install Ubuntu GNU/Linux: * https://github.com/ventoy/Ventoy/issues/2595 Is this an OS installation ISO issue, or is it a Ventoy issue? If it's a Ventoy issue, please inform about this. # Inform about this Something like "The free disk space cannot be used to install an operating systems (OS), if the OS installation ISO is run from Ventoy on the same disk" ## In the Ventoy making program ![image](https://github.com/ventoy/Ventoy/assets/6416073/6bee55d4-4109-4616-ad0f-edb5c2559d8d) ## In the documentation Mention this at https://ventoy.net/en/doc_non_destructive.html

deekerman commented

2026-02-20 18:10:50 -05:00

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Owner

@catherinedoyel commented on GitHub (Nov 10, 2023):

Please read the documentation section Reserved Disk Space
Running the live Linux os will usually put the /dev/sdX will put the drive into a read only state in most distros. For Ubuntu I would recommend that you run in uefi mode. Press e on the boot option for Ubuntu & add delete quiet and put toram in it's place this will download the whole Ubuntu iso to ram then once you are on the desktop just pull your flash drive out & then put it back in now the drive should be writable. Have Ubuntu two partitions in the unallocated space. Efi System Partition 500mb then your root file system for the rest of the drive. To choose Ubuntu boot up next time either select the 3rd partition from your motherboard boot menu or if it's not available use the following feature to find the 3rd partition Ubuntu boot files and go to /efi/boot/bootx64.efi

@catherinedoyel commented on GitHub (Nov 10, 2023): Please read [the documentation](https://ventoy.net/en/doc_disk_layout.html) section `Reserved Disk Space` Running the live Linux os will usually put the /dev/sdX will put the drive into a read only state in most distros. For Ubuntu I would recommend that you run in uefi mode. Press `e` on the boot option for Ubuntu & add delete `quiet` and put `toram` in it's place this will download the whole Ubuntu iso to ram then once you are on the desktop just pull your flash drive out & then put it back in now the drive should be writable. Have Ubuntu two partitions in the unallocated space. Efi System Partition 500mb then your root file system for the rest of the drive. To choose Ubuntu boot up next time either select the 3rd partition from your motherboard boot menu or if it's not available use the following [feature](https://ventoy.net/en/doc_browser.html) to find the 3rd partition Ubuntu boot files and go to `/efi/boot/bootx64.efi`

deekerman commented

2026-02-20 18:10:50 -05:00

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Owner

@davidhedlund commented on GitHub (Nov 11, 2023):

pull your flash drive out & then put it back in now the drive should be writable.

Thank you very much for your effort to help me.

So I'm running Ventoy from a SSD drive with Ubuntu in live mode, which I'm trying to install on the same SSD drive, so I cannot pull the SSD drive and the plug it back. Please read:

https://github.com/ventoy/Ventoy/issues/2595

@davidhedlund commented on GitHub (Nov 11, 2023): > pull your flash drive out & then put it back in now the drive should be writable. Thank you very much for your effort to help me. So I'm running Ventoy from a SSD drive with Ubuntu in live mode, which I'm trying to install on the __same__ SSD drive, so I cannot pull the SSD drive and the plug it back. Please read: * https://github.com/ventoy/Ventoy/issues/2595