The Read-only attribute protects data stored on Hard Disk. This article shows how to make disk or disk partition read-only in Windows 11/10.

I have a 10.2 install cd at my disposal, but I don't have my 9.2.2. The only other computer on my home network is a windows PC, which would seem to negate any network startup possibilities.

Unallocated Disk Space can be assigned its own volume letter or used to extend another drive. Types of Partitions are also explained.