# The game asks for its CD under Wine on Linux, though the disc's folder is mapped with the right label

## Symptoms

The game asks to "Insert the CD", though the disc's files are mapped as drive D: and the
volume label is set. With a real CD device attached, Wine's `+volume` trace shows
`cannot open device D: c0000022`.

## Cause

Two causes came one after the other (*observed* in POD with `WINEDEBUG=+volume`).

- Under Wine on Linux a folder mapped as a drive is a fixed drive. `GetDriveTypeW` returns 3,
  even with the drive's type set in `HKLM\Software\Wine\Drives`. On macOS the same setting
  worked. A game that looks for a drive of type 5 never finds the disc.
- Wine opens the CD device to read its label. `/dev/sr1` was readable by root only, so the open
  failed with `c0000022` (access denied).

## What to do

Attach the disc's data track as a CD-ROM device. A mapped folder stays a fixed drive. Cut the
track out of the BIN/CUE with `./gameframe run discinfo IMAGE.cue --iso DISC.iso`. Attach the
ISO as a CD-ROM drive in the emulator. Map Wine's D: to the device's mount point. Make the
device readable by everyone with a udev rule, `KERNEL=="sr[0-9]*", MODE="0644"`. `emupc.py`
writes that rule.