Package:  Debian stable installer

Version:   10.7.0, and 10.8.0

Severity:  Critical


Hard drive was formated as GPT.  Installer will not write to disk after setting up file system/partitions if an EFI partition is created first.  Error message indicates "Can't write to disk". Once the EFI partition is removed then the installer will write to disk.  This presents a problem to people wishing to dual boot with EFI partitions on a GPT formatted drive.

Hardware that this occurred on is a Dell XPS 15 7590. This laptop came out in late 2019.

One of the key benefits of a GPT formatted partition is being able to install windows in any order -- first or last.  But that won't be possible on this laptop because Linux has problems with EFI if installed first.  No test was done to see if a problem would occur if the EFI was installed last.

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