[plasmashell] [Bug 524464] New: Total disk space available is duplicated, I'm guessing due to full disk encryption

https://bugs.kde.org/show_bug.cgi?id=524464

            Bug ID: 524464
           Summary: Total disk space available is duplicated, I'm guessing
                    due to full disk encryption
    Classification: Plasma
           Product: plasmashell
      Version First 6.7.4
       Reported In:
          Platform: Arch Linux
                OS: Linux
            Status: REPORTED
          Severity: minor
          Priority: NOR
         Component: System Monitor widgets
          Assignee: [email protected]
          Reporter: [email protected]
                CC: [email protected], [email protected]
  Target Milestone: 1.0

Created attachment 195280
  --> https://bugs.kde.org/attachment.cgi?id=195280&action=edit
Incorrect disk space available

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DESCRIPTION
The disk size seems to be duplicated. My encrypted SSD is ~1TB but the applet
claims the total size is 1.8 TB.
```
[ ~ |0] sudo LANG=C fdisk -l
Disk /dev/nvme0n1: 931,51 GiB, 1000204886016 bytes, 1953525168 sectors
Disk model: WD Blue SN5100 1TB                      
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 32768 bytes / 524288 bytes
Disklabel type: gpt
Disk identifier: B9ADDD14-427A-4402-8DFE-7A2DE4A889BC

Device           Start        End    Sectors   Size Type
/dev/nvme0n1p1    2048    8390655    8388608     4G EFI System
/dev/nvme0n1p2 8390656 1953523711 1945133056 927,5G Linux filesystem

Disk /dev/mapper/root: 927,5 GiB, 995891347456 bytes, 1945100288 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 32768 bytes / 524288 bytes
``` 

STEPS TO REPRODUCE
1. 
2. 
3. 

OBSERVED RESULT


EXPECTED RESULT
The total size of a 1TB disk is ~1TB regardless of encryption.

SOFTWARE/OS VERSIONS
Operating System: Arch Linux 
KDE Plasma Version: 6.7.4
KDE Frameworks Version: 6.29.0
Qt Version: 6.11.1
Kernel Version: 7.1.8-arch1-3 (64-bit)
Graphics Platform: Wayland
Processors: 24 × AMD Ryzen AI 9 HX 370 w/ Radeon 890M
Memory: 32 GiB of RAM (30.5 GiB usable)
Graphics Processor: AMD Radeon 890M Graphics

ADDITIONAL INFORMATION

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