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Form factors for storage media PDF Print E-mail
Written by Garfield Lucas   

The following table lists various hard disk and SSID form factors and gives their actual size in millimetres.


5.25" Full-Height 130.05 146.05 203.2 82.55 All drives in early 1980s; Large capacity drives with many platters as late as the mid-1990s
5.25" Half-Height 130.05 146.05 203.2 41.4 Early 1980s through early 1990s
5.25" Low-Profile 130.05 146.05 203.2 25.4 Quantum Bigfoot, mid-to-late 1990s
5.25" Ultra-Low-Profile 130.05 146.05 203.2 19.05 Quantum Bigfoot, mid-to-late 1990s
5.25" Ultra-Low-Profile 130.05 146.05 203.2 20.32 Quantum Bigfoot, mid-to-late 1990s
3.5" Half-Height 63.5 101.6 146.05 41.4 High-end, high-capacity drives
3.5" Half-Height 76.2 101.6 146.05 41.4 High-end, high-capacity drives
3.5" Half-Height 95 101.6 146.05 41.4 High-end, high-capacity drives
3.5" Low-Profile 63.5 101.6 146.05 25.4 Industry standard, most common form factor for PC hard disks
3.5" Low-Profile 76.2 101.6 146.05 25.4 Industry standard, most common form factor for PC hard disks
3.5" Low-Profile 95 101.6 146.05 25.4 Industry standard, most common form factor for PC hard disks
2.5" 19 mm Height 63.5 69.85 100.08 19.05 Highest-capacity 2.5" drives, used in full-featured laptop systems
2.5" 17 mm Height 63.5 69.85 100.08 17.02 Mid-range capacity drives used in some laptop systems
2.5" 12.5 mm Height 63.5 69.85 100.08 12.45 Low-capacity drives used in small laptops (subnotebooks)
2.5" 9.5 mm Height 63.5 69.85 100.08 9.4 Lowest-capacity drives used in very small laptops (mini-subnotebooks)
PC Card Type I 45.72 54.1 85.6 3.3 Not used forĀ hard disks
PC Card Type II 45.72 54.1 85.6 5.08 Smaller-capacity expansion hard disks for laptops and consumer electronics
PC Card Type III 45.72 54.1 85.6 10.41 Higher-capacity expansion hard disks for laptops
Compact Type I 25.4 42.93 36.07 3.3 Smaller-capacity flash cards for digital cameras, hand-held computers and consumer electronics; not used forĀ  hard disks (yet)
Compact Type II 25.4 42.93 36.07 5.08 Larger-capacity flash cards and hard disks for digital cameras, hand-held computers and consumer electronics
SD
(Secure data)

n/a
32
242.1Digital cameras, MP3 players and many other devices. Available in a variety of capacites:-

Standard SD: 4 MB to 4 GB
SDHC: 4 GB to 32 GB
SDXC: 32 GB to 2 TB

Last Updated on Thursday, 30 July 2009 23:22
 

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