What is the capacity of the biggest hard drive available today?
Currently, commercial computers (sold at hardware stores to
normal customers) mostly contain hard disk that have a capacity
around 500 gb, for desktops, and 120gb for notebooks. The 500gb
could sometimes even be 1TB for desktops
IMPROVED:
As of this response (7/21/2010) the largest HDDs in production
are 1.5 TB for 3.5" and 4.5 TB for external/array packages. However
technology is in prototype with up to 4.5 TB 3.5" available
relatively soon (within a couple years).
The largest memory modules in commercial production are 16 GB
DDR2 sticks, though only 4GB sticks are common for end-users.
The largest SSDs available are currently around the 500 GB mark,
and rediculously expensive.
The largest EEPROMs are 64 MB single-chip
The largest SRAM caches are 8 MB single-chip
The highest commercial density storage is Blu-Ray with 25 GB per
layer (50 GB dual-layer), but with HVDs and PSDs on the way.
The largest tape drive is an astounding 12 TB 14.5" tape from
IBM
The largest Flash single-chip module is 512 MB (of course much
bigger can be made combining chips, as almost all flash devices
do)
Largest SD card is 64 GB
Largest single-CPU cache combination structure is 12,928 KB
Largest CPU register bank is 4096 bits
Largest HDD buffer is 32 MB
Largest sequential tape memory is 1 GB
Largest video card is 8 GB
And that's all I know for the moment. (Whew, that took some
research!)