Write Protecting the HDD after RH install

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Author: plug-discuss@lists.plug.phoenix.az.us
Date:  
Subject: Write Protecting the HDD after RH install
I have a 1GB flash drive with a RH 7.3 server installation. I performed the install with the write protect disabled. The boot is 10MB, swap 50MB, and root 917MB. Halt the system, enable the write protect, and boot the system.

The boot process is stopped when remounting the root file system in read-write mode. So the write protect is doing its job. My question is how can I make the file system read only?

I few more questions.
Do I need to have a swap partition?
Should Linux run correctly with swap partition on a secondary HDD?
Does Linux scratch files like Windows?

Regards,
Darren