CST 334: Week 7

 This week I learned about file systems, hard discs, and how the operating system interacts with I/O devices. It is important to understand how the operating system interacts with I/O devices because it is the core of what makes a program a program, printing out or some other output is essential to all programs and many use input from another devices to change the output. Using busses to create a hierarchy of devices is the best way to interact with these devices. Another thing I learned this week was the RAID style of disk management. RAID 0 is known as striping and strips the blocks along the discs in sequential order, RAID 1 uses mirroring where each block is stored on at least two discs to ensure that if 1 disk fails then the data is stored on a second disc. Raid 4 and 5 both make use of parity bits which track information within the other discs in a designated disc. Raid 4 puts all of the parity blocks on the same disc and Raid 5 distributes the parity blocks among all the discs for better safety. 

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