I cloned the BIOS configuration across my two XTIDE cards, so it probably shouldn’t have been a surprise that the second one worked.

Still, I wasn’t sure how the Model 3 would behave with its original-style hard drive arrangement still installed.

It behaved perfectly.

Like a gentleman and a scholar.

That means both my Model 2 and Model 3 TeraDrives can now use XTIDE storage.

The Model 3 originally shipped with a 30 MB internal hard drive, while the Model 2 had no hard disk at all.

XTIDE gives me a much easier route to modern ATA storage and makes me far less dependent on finding surviving examples of the proprietary 44-pin power-and-data drives used by the original Model 3 setup.

I have personally confirmed IBM WDL-330P drives working in the TeraDrive. WDL-330PS drives have also been reported in surviving machines, but I have not confirmed that variant firsthand.

Fresh date and time batteries, modern storage options and both machines booting properly.

Hopefully nothing else will go wrong!

Fingers crossed! :D

Further Reading

• Sega TeraDrive Hard Drive Interface Investigation
• Sega TeraDrive Model 3 Hard Drive Replacement

Sources

• Sega Hardware Archive - TeraDrive - documents the Model 3 with a 30 MB internal hard drive and the Model 2 without one.
• IBM Files - PS/2 Model 25 - documents the related proprietary direct-bus-attachment storage arrangement.