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DiskCheck
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The Channel banner, the same template used for development WiiWare games
Channel ID�DCK (It's possible the first character is a Japanese character)
Channel IOSIOS9

Disk Check Tool is used to check if a Wii disk is still working. This is done by reading all the bytes availible on the disc. This tool can only check retail Wii games, and was mainly used when customers had problems reading their discs.

About

This software came bundled with every RVT-R and RVT-H, but the RVT-H makes no use of this tool. When a disc is inserted, it reads all the data in bytes on that disc.