Comparison of Secondary Storage Devices and Media

Theresa Sullivan

Angela Volk

8” and 5.25” Floppy Disks

• The first floppies were 8” disks used for everything

• The first 5.25” floppy disk had 40 sectors per side, so they could only hold 360 KB

• The most popular 5.25” floppy had 80 sectors and held 1.2 MB of data

• Floppy disks were easily damaged

Floppy Disks

• 3.5” floppy disks were invented in 1980

• They were no longer “floppy” because of their hard protective envelope

• Disk drives come with computer

• The cost per disk is approximately $.37

Zip Disk

• Zip disk were produced by Iomega• Zip drive cost $150 for 250MB or $80 for 100MB• Zip disk cost $15 for 250MB and $10 for 100MB• Fire wire is available to connect through USB port.

$80 • Storage speed: The Fire Wire adapter read speed 2.0

MB/second• Zip 250 USB drive 0.9 MB/second

Jaz Disk

• Single Jaz® 1GB disk cost $100

• Single Jaz® 2GB disk cost $125

• Single Jaz ® drive cost $275

• Transfer rates up to 8MB/sec

Peerless

• Peerless is the newest invention by Iomega

• The disk come in 10 and 20 GB

• The drive and the 20 GB disk cost $325

• The drive and the 10 GB disk cost $285

CD Rewritable Drives

• Three attributes – read, rewrite, and write speed

• Two types of CD media – CD-R and CD-RW

• Storage capacity 650 or 700 MB• Cost per disk

– CD-R about $0.60– CD-RW about $1.58

CD Rewritable Drives (Cont.)

• Cost per drive– Internal, 8x write ~$130 (CenDyne,

creative labs)– Internal 16x ~$230 (Yamaha)– External 12x ~$200 (Iomega)– External 16x ~$380 (Yamaha)

USB Hard Drives

• The size of a key chain and made to work in any USB port

• Data storage of 16, 32 or 64 MB

• Plug n play

• Write and read just like a hard drive

• Write speed 350 kb/s

• Read speed 700 kb/s

USB Hard Drives (Cont.)

• Cost– 16m $70– 32m $130– 64m $200• Comes in cool colors!

DVD Rewritable Drives

• DVD = digital versatile disk

• Recordable media available – DVD+RW, DVD-RW, and DVD-RAM

• DVD+RW fully compatible with DVD-video and DVD-ROM

• 4.7 gigabytes of data storage on a single side

DVD Rewritable Drives (Cont.)

• DVD+RW media costs ~$12

• Speculated HP DVD+RW drive costs ~$699

• Expected to be available sometime in 2001

Cost per Byte for MediaCost per Byte for DriveCost of Drive + 1 MediaCompact Disc- R $0.00086 $0.214 $150.60Compact Disc- RW $0.00243 $0.231 $151.58100MB zip disk $0.10000 $0.790 $89.00250MB zip disk $0.06000 $0.600 $165.00Zip with Fire Wire N/A N/A $79.00Floppy Disk- High Density $0.23871 N/A $0.37Floppy Disk- Double Density $0.48611 N/A $0.35USB N/A $4.375 $70.001GB Jaz Disk $0.09000 $0.275 $365.002GB Jaz Disk $0.05000 $0.138 $375.00DVD $0.00249 $0.145 $711.00Peerless 10 $0.01000 $0.019 $285.00Peerless 20 $0.00625 $0.010 $325.00