/shared2/test2/dvderror.dat
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/shared2/test2/dvderror.dat is a file created by Nintendo titles to keep track of disc drive errors. It contains up to 8 error entries, each of which are 128 bytes and contain information about the error and a list of the last 5 commands executed. The first entry (offset 0) appears to be used as a fallback if something goes wrong when seeking for other entries; the second entry (offset 0x80) is used to track what to write next.
| Offset | Size | Meaning |
|---|---|---|
| 0x00 | 4 | Game ID |
| 0x04 | 1 | Disc number |
| 0x05 | 1 | Disc version |
| 0x06 | 2 | padding |
| 0x08 | 4 | Error code |
| 0x0C | 4 | Time (seconds?) |
| 0x10 | 4 | Value of DISR |
| 0x14 | 4 | Value of DICR (or result from a command on some titles) |
| 0x18 | 4 | Next error slot to write (or tick of execution for a command on some titles) |
| 0x1C | 4 | Command |
| 0x20 | 4 | Command parameter 1 |
| 0x24 | 4 | Command parameter 2 |
| 0x28 0x3C 0x50 0x64 |
4 | Command result |
| 0x2C 0x40 0x54 0x68 |
4 | Tick of command execution (value of TBLr register) |
| 0x30 0x44 0x58 0x6C |
4 | Command |
| 0x34 0x48 0x5C 0x70 |
4 | Command parameter 1 |
| 0x38 0x4C 0x60 0x74 |
4 | Command parameter 2 |
| 0x78 | 4 | Result of last executed command |
| 0x7C | 4 | Unused |
There are some special error codes, beyond what is returned by DVDLowRequestError:
| Code | Meaning |
|---|---|
| 0x01234567 | Error without error code (e.g. reading error failed) |
| 0x01234568 | Timed out (/dev/di return value 0x10) |
| 0x01234569 | Security error (/dev/di return value 0x20) |
| 0x0123456A | BCA mismatch (used by New Super Mario Bros. Wii) |
