AllowRawDiskRead is a sandbox setting in Sandboxie Ini available since v0.7.0 / 5.48.0. This setting can be used to disable protection which prevents elevated sandboxed processes from accessing volumes/disks for reading.
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[DefaultBox]
AllowRawDiskRead=y
Related Sandboxie Plus setting: Sandbox Options > File Options > Allow elevated sandboxed applications to read the harddrive