File talk:Hard drive capacity over time.png
This graph doesn't really show much, except that capacity grow larger... It lacks data for the last few years and misses that Terabyte disks have been introduced in Q1 2007. The "average" line is pointless, as it doesn't account for the obvious speed-up around the year 2000 and the slow-down in recent years. —Preceding unsigned comment added by 77.135.111.133 (talk) October 21, 2008
I agree. This graph's dataset is lacking. It would be good to know where the data came from so that it can be expanded.
--- Where can you buy a 5TB drive? I'm pretty sure they still don't exist as of May 2010 —Preceding unsigned comment added by 72.22.29.98 (talk) 14:42, 25 May 2010 (UTC)
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The original document was titled "personal Computer" hard drive capacity. Then someone criticizes the file for not including the IBM 3380. Those drives were mainframe drives, not able to be hooked to a PC at all. The 3380 fit into a box several feet on a side and required a large supply of forced cool air. It was, as was the fashion for the time, formatted to meet the needs of the application - if the application had 80 byte records, the file (a range of tracks or cylinders) would be formatted as it was being written to a multiple of 80, probably at least 8000. The track size was over 50k, and the data transfer rate was close to the channel speed of 1.5 megabytes per second. But the gaps between the physical records were very, very large in proportion to the 3350, IBM's previous drive. If you did not carefully block you could get a track capacity of under 100 records.
