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Comparison of Storage Media (֤)

Media Type Capacity Seek Time Data Rate Comments
Hard disk 18 GB 8.5 ms 80 MB/s High speed read/write
Floppy disk 1.44 MB 100 ms slow Removable
CD-ROM 640 MB 80 ms 2-5 MB/s Read only
MO 1.3 GB 28 ms slow write/fast read Removable
DVD-RAM 17 GB 80 ms (?) ?  
QIC tape 2.5 GB seconds 0.3 MB/s  
8mm tape 20 GB seconds 3 MB/s  
4mm tape 12 GB seconds 1 MB/s  
Optical tape 27 GB seconds 3 MB/s  



David Asano
2001-05-29