Hard Disk Drives:
In 1974, the flying height of a recording head over a hard disk was equivalent to a commercial aircraft flying at 15 centimeters. Today, that equivalent altitude has been reduced to just 5 millimeters. The drive head now has to withstand repeated vertical accelerations of 300 Gs and lateral accelerations of 1000 Gs. What's more, whereas the jet is designed for 60,000 takeoffs and landings, the heads are now designed for 100,000.
- 1980 – 5 MB (Megabyte) 5.25 inch Winchester drive (Shugart ST-506)
- 1983 - 10 MB 3.25 inch drive (Rodine)
- 1991 - 100 MB 2.5 inch hard drive
- 1995 - 2 GB (Gigabyte) hard drive
- 1997 - 10 GB hard drive
- 2003 - 60 GB hard drive (Seagate)
- 2005 - 500 GB hard drive (Hitachi)
- 2006 - 750 GB hard drive (Seagate)
- 2007 - 1 TB (Terabyte = 1000GB) hard drive (Seagate)
Intel Pentium CPUs:
- March 1993 - Pentium 60 MHz. 3.1 million transistors.
- March 1994 - Pentium 75 MHz. 3.2 million transistors.
- June 1995 - Pentium 133 MHz. 3.3 million transistors.
- June 1996 - Pentium 200 MHz. 3.3 million transistors.
- May 1997 - Pentium II 300 MHz. 3.3 million transistors.
- August 1998 - Pentium II 450 MHz. 7.5 million transistors.
- August 1999 - Pentium III 600 MHz. 9.5 million transistors.
- March 2000 - Pentium III 1.0 GHz. 28 million transistors.
- Aug 2001 - Pentium 4 2 GHz. 42 million transistors.
- Nov 2002 - Pentium 4 3.0 GHz. 55 million transistors.
Donline is the local, friendly and professional IT service based in Witley in Surrey.
Please contact me to discuss your IT requirements. You can email me at don@donline.co.uk
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