Satellite Pro Line

The Toshiba Satellite Pro was a line of business PCs manufactured by Toshiba starting in September 1994. Toshiba Satellite Pro recovery media is very rare and also very unique. The process of how Toshiba built the media is similar in line to the Tecra line of PCs which were also for businesses.

Layers of Discs
A: is boot image

D: is MSCDEX (Microsoft CD driver)

These are all known (at least what we can see) layers that are on Toshiba Satellite Pro recovery discs. OS.ZIP has all of the files, install files so to speak and PowerISO does not show TOCDEX nor can you get it to show up in it. Its believed that PowerISO shows MSCDEX in lieu of ToshibaCDEX. TOCDEX is apparently an in-house developed Toshiba CD-ROM extensions driver and its not documented or known anywhere online.

Missing Information
Toshiba when they created the recovery media missed an important thing about it. That would be the Volume Descriptor Set Terminator which is kind of important to have as it'll just keep reading data and it doesn't know what layer is what as its all just one big layer if there's not at least 1 terminator. It reads in DOS fine though.