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The advantages of using Minix 3 are :
a. Reduce kernel size
Monolithic operating systems such as Linux and FreeBSD and hybrids like Windows have millions of lines of kernel code. In contrast, MINIX 3 has about 6,000 lines of executable kernel code, which can make problems easier to find in the code.
b. Cage the bugs
In monolithic operating systems, device drivers reside in the kernel. This means that when a new peripheral is installed, unknown, untrusted code is inserted in the kernel. A single bad line of code in a driver can bring down the system. In MINIX 3, each device driver is a separate user-mode process. Drivers cannot execute privileged instructions, change the page tables, perform arbitrary input/output (I/O), or write to absolute memory. They have to make kernel calls for these services and the kernel checks each call for authority.
c. Limit damage from buffer overflows
MINIX 3 uses fixed-length messages for internal communication, which eliminates certain buffer overflows and buffer management problems. Also, many exploits work by overrunning a buffer to trick the program into returning from a function call using an overwritten stacked return address pointing into the overrun buffer. In MINIX 3, this attack does not work because instruction and data space are split and only code in (read-only) instruction space can be executed.
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What are the advantages and disadvantages of Windows 2000 to minix 3?
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