Storage Operating Systems
1 - Storage Operating Systems introduction. Why do you think the spreadsheet helped popularize PCs in business and not word processing? Don`t more people use word processing than spreadsheets? Spreadsheets is needed in almost all applications where a certain number of numeric data needs to be processed, graphed or analyzed. Although more people use word processing than spreadsheets, spreadsheets are something that are so much difficult to process without a computer. So in the past, while word processing can be replaced by manual typewriters, spreadsheets needs a lot of time to be processed manually.
So people tend to look for PCs when faced with numeric processing like financial statements in accounting. 2. What are some common mistakes that businesses make when backing up their files? 1) Not making backup on regular basis 2) Not verifying backup data 3) Backup files are not maintained with physical security such as locks or security lockers 4) Backup tapes are not rotated to new position, overwriting the same space with the new file 5) Backup Files are saved in absolute path names not in relative path names 6) Not maintaining recovery boot disk or recovery media ) Not having a backup of your recovery media 8) Not backing up file systems separately 9) Failing to backup special files normally skipped by ordinary backup utility files 10) Absence of backup logs 11) Unlabelled backup data 3. Some of the mistakes potentially could be catastrophic. Which of the common mistakes that you described are potentially catastrophic and why?
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1) Not making backup on regular basis – this is catastrophic because we normally recognize the importance of backing up files after the loss of important data. A single mishap could lead to loss of important data. ) Not verifying backup data – this is also catastrophic because you might never know that the backup you are relying on is corrupted and unusable therefore an accident on your maid data could wipe out your entire data. Also you might never know that you are already using a corrupted back up drive or backup tape drives. 3) Backup files are not maintained with physical security such as locks or security lockers – this is catastrophic because common thieves might come across your backup files and destroy them in search for other valuable items. Or worst someone who new the importance of these files might steal them.
Then in the event of main data loss while the backups are gone could lead to a major catastrophe. 4) Backup tapes are not rotated to new position, overwriting the same space with the new file – this is also catastrophic if for example while doing the copy a crash would occur this could render both the backup and the main data unusable. Recovery files and system files related mistake may not be catastrophic because in most cases you can find an alternate copy of system or recovery files from vendors to recovery your operating system. 4. What is the mistake in Figure 6-15?
Try to be imaginative and not repeat the answers of those who post before you. No figures included in order. 5. Why is it called booting? Does it have something to do with kicking or kick starting the computer? Booting is a shortened version of Bootstrapping. Bootstrapping originated from a German legend “Baron Munchhausen who used his own boot straps to pull himself out of the sea” (Wikipedia , 2007). So that act of pulling himself out was used to describe how a simple startup program tries to pull himself out from off to full activation mode. 6. Will a desktop PC boot if the keyboard is disconnected?
Mouse? Monitor? Desktop PC terminates boot sequence when keyboard is disconnected. It will then prompt for a keyboard error. A disconnected mouse do allow most system to boot up but a message is prompted at the start of the main operating system that the keyboard is unavailable. A disconnected monitor, for example if the video card is unavailable, would not allow the system to boot. In most cases a buzzer sound is generated at the start of booting sequence indicating the absence of a video card or a video connection to the monitor. 7. Why can`t your PC run programs simultaneously?
Or can it? In reality PCs do not run programs simultaneously because there is only one processor that processes 1 instruction at a time. Multitasking operating system rather divides programs into smaller segments allowing segments of different programs to be processed one after the other providing an effect where the program runs concurrently as a whole. Although there are new dual core processors in the market that process programs simultaneously, and still it subdivides bigger programs into smaller segments and the dual core process different segments simultaneously. . Should computers be sold without installed operating systems? Why or why not? Yes computers should be sold without operating system since there are already a lot of open source and free linux distributions that provides functionality comparable to commercial operating system. These free and open source linux distributions can be freely downloaded from the web. It is also possible to compile your own distribution from these open source distributions.