storageinfo - CS101 Lecture 13 Computer Hardware Storage...

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CS101 Lecture 13 Computer Hardware Storage Information
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Storage The zeros and ones in the input devices, output devices and process devices are in electronic form and are lost when the computer is turned off. To preserve the zeros and ones when the computer is turned off they are sent to storage devices The computer stores the zeros and ones in byte size chunks
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Bits to Bytes A zero or a one = Bit 8 Bits = Byte Computers store things in byte size chunks 1024 Bytes = Kilobyte = 1024 Bytes 1024 Kilobytes = Megabyte = 1,048,576 Bytes 1024 Megabytes = Gigabyte = 1,073,741,824 Bytes 1024 Gigabytes = Terabyte = 1,099,511,627,776 Bytes Etc Keeps going by a factor of 1024 1024 because computer is a base 2 creature
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What type of file is what size? What type of files would be kilobyte size? Text Files (Word documents, emails, HTML documents, etc) What type of files would be megabyte size? Applications (Word, Firefox, iTunes, etc) Small Multimedia (MP3’s, Web videos, Pictures, etc) What type of files would be gigabyte size? Large Multimedia (Movies, Video, etc) Large collections of files (Office, Windows, etc)
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How much can storage devices hold? Kilobyte storage devices None Common - To small Megabyte storage devices Floppy Disk (1.4 Mb) Zip Disk (100, 250, 750 Mb) Flash Drives (128, 256, 512 Mb) CD (Up to 700 Mb) Gigabyte storage devices DVD Disk (Up to 8.5 Gb on one disk) Hard Drives (Up to 750 Gb on one drive)
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How big is it? How do I know how many bytes a file is taking up on a disk?
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