Form factors for storage media
The following table lists various hard disk and SSD form-factors and gives their actual size in millimetres.
Factor |
Profile |
Platter Size (mm) |
Width (mm) |
Depth (mm) |
Height (mm) |
Comment |
|---|---|---|---|---|---|---|
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 for 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 for 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 |
24 |
2.1 |
Digital cameras, MP3 players and many other devices. Available in a variety of capacities:-
Standard SD: 4 MB to 4 GB Standard SD card has 9 contacts |
|
Mini SD |
n/a |
21.5 |
20 |
1.4 |
Mini SD card has 11 contacts |
|
Micro SD |
n/a |
15 |
11 |
1 |
MicroSD card has 8 contacts |
|
TF (Trans Flash) |
n/a |
15 |
11 |
1 |
TF card has 8 contacts |