Data Storage and You

Introduction Most will ask the question: What is data storage? The easiest answer however is a place that you store your information….be it a document, a phone number, a picture, a movie; the possibilities are endless. However, what many people get lost in is what type of data storage best suits their needs. Since the possibilities of storage are vast, so too, are the abilities of various types of storage.

Floppy DisksCd-romHard DrivesVirtual Storage The following slides will show the various types of data storage that have existed over time, and now. DATA STORAGE TYPES

FLOPPY DISKS

8 Floppy Disk The 8 Floppy was the first floppy disk around. However, it was not a publicly used disk. The original usage of these disks were to store and load microcode onto the mainframe processors. The microcomputers that were used primarily for word processing and engineering utilized one or more 8-inch drive. 8 inch Floppy disk Picture Credits: Floppy-8inch-wDiskette.gif

DiskForm factor[1]Year introduced FormattedMarketed Storage capacitycapacity¹ (in KB = 1024 bytes if not stated) IBM 23FD[2]8-inch ? Memorex 6508-inch megabit [3] [unformatted] IBM 33FD / Shugart 9018-inch - SSSD [4][5] 3.1 Mbits unformatted IBM 43FD / Shugart 8508-inch - DSSD [6]6.2 Mbits unformatted IBM 53FD / Shugart 8508-inch DSDD (CP/M) 1.2 MB (MS-DOS FAT) Abbreviations: DD = Double Density; QD = Quad Density; HD = High Density; ED = Extended Density; LS = Laser Servo; HiFD = High capacity Floppy Disk; SS = Single Sided; DS = Double Sided

This was the first disk used by computers commercially. Users would use a series of these disks to load and hold information for programs as well as documents, and reports. Its capacity maxed at 1.2 MB, however it started at 100KB Capacity Credit Photo credit to: commons.wikimedia.org

Historical sequence of floppy disk formats Disk formatYear introducedFormatted Storage capacityMarketed capacity inch (35 track) Shugart SA [23]87.5 KB[24]110 kB inch DD or 800 KB360 kB inch Apple Disk II (Pre-DOS 3.3) KB (256 byte sectors, 13 sectors/track, 35 tracks) 113 kB inch Atari DOS 2.0S KB (128 byte sectors, 18 sectors/track, 40 tracks) 90 kB inch Apple Disk II (DOS 3.3) KB (256 byte sectors, 16 sectors/track, 35 tracks) 140 kB inch HP single sided ×16×70 = 280 KB264 kB inch Atari DOS KB (128 byte sectors, 26 sectors/track, 40 tracks) 130 kB inch QD 720 KB720 kB inch RX50 (SSQD)Ca kB[citation needed]400 kB inch HD1982[28]1155 KB1.2 MB inch Perpendicular1986[30]10 MB[citation needed] ? Abbreviations: SD = Single Density; DD = Double Density; QD = Quad Density; HD = High Density; ED = Extended Density; LS = Laser Servo; HiFD = High capacity Floppy Disk; SS = Single Sided; DS = Double Sided

3 ½ Floppy The 3 ½ floppy slowly replaced the 5 ¼ floppy due to its smaller size, slightly larger storage capacity and its more resilient casing. The disk no longer was floppy but rather was sturdy. Image Credits:

Historical sequence of floppy disk formats Disk formatYear introducedFormatted Storage capacityMarketed capacity inch HP single sided ×16×70 = 280 KB264 kB inch (DD at release)1983[27] 720 KB (400 SS, 800 DS on Macintosh, 880 DS on Amiga) 1 MB inch HD KB1.44 MB (2.0 MB unformatted) inch ED1987[31]2880 KB2.88 MB 3 12-inch Floptical (LS) KB21 MB inch LS MB120 MB inch LS MB240 MB inch HiFD1998/99150/200 MB[citation needed]150/200 MB Abbreviations: SD = Single Density; DD = Double Density; QD = Quad Density; HD = High Density; ED = Extended Density; LS = Laser Servo; HiFD = High capacity Floppy Disk; SS = Single Sided; DS = Double Sided Formatted Storage Capacity is total size of all sectors on the disk:

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CD-rom & DVDs are another type of data storage. Much like the floppy disks, they have gradually increased their capacity, and have discontinued the services rendered by their predecessors. CDs and DVDs store data slightly differently however, they store their information through laser transfer. A laser will beam the information into the CD or DVD and digitally read the information from the shiny underside of the disks.

Type of StorageStorage Capacity CD – rom / CD-r700 MB DVD -/+ R4.7 GB Dual Layer DVD8.5 GB The following table shows the increase of data from 1.44 MB to the current 4.7 GB storage & 8.5 GB capacity of DVDs.

Hard Drives There are several different types of hard drives that can store data. These hard drives include: Internal Hard Drives – the hard drives that are installed into your computer GB+Internal+Hard+Drive/ p?id= &skuId= External Hard Drives – Hard drives that are able to be remotely plugged into any computer via a USB port, and come with its own power supply. +My+Book+Essential+3TB+External+USB+3.0/2.0+Hard+Dri ve+-+Black/ p?id= &skuId= Portable Hard Drives - These hard drives are similar to External Hard Drives with the added benefit of being slender and light weight for easier transport. These hard drives do not have a power supply, but rather utilizes the power supply of the computer to be operated. +Canvio+Basics+HDTB105XK3AA+500+GB+External+Hard+ Drive/ p?id= &skuId= Internal Hard Drives External Hard Drives Portable Hard Drives

Hard Drives Overview The following table shows the basic capacity of the common hard drives that are on the market today. CapacityDigital Music (Hours) Digital Photos (Files) Digital Videos (Hours) DVD Quality (Movies) HD Videos (Hours) 320 GBup to 5,000up to 100,000up to 320up to GBup to 12,000up to 240,000up to 750up to TBup to 16,600up to 320,000up to 1,000up to TBup to 33,320up to 640,000up to 1,000up to TBup to 49,980up to 960,000up to 3,000up to 750 Average file size using cameras highest resolution JPEG mode Based on standard 2- hour movie Based on H.264 compression at 6.7Mbps bitrate

Virtual Storage The last category of types of Data Storage is virtual storage. The most recent introduction, it allows data to be stored over the internet. There are several different types of data storage sites that can be utilized – the most common of which is The Cloud.