Monster Machines: The Most Expensive Hard Drive Ever

Twenty-two gigabytes seems like a paltry amount of storage by today's standards, but in the early days of networked computing -- when most storage capacities were measured in a lower order of magnitude -- IBM's ultimate DASD offered an unheard of amount of space.

Through the late 1980s and early 1990s, magnetic tape drives were the go-to technology for long term storage of large amounts of data. Spinning platter hard drives -- such as the ubiquitous 3.5-inch and 5.25-inch variations -- had already been invented but rated to a few megabytes at most; they lacked the necessary capacity for use as commercial storage solutions. And so Direct Access Storage Devices (DASD) were developed to fill this role.

Unlike tape drives that only allow sequential access to data, these massive, platter-based drives could jump to the necessary information just as modern hard drives do. The largest of these was the IBM 3390, which was unveiled in 1989 and featured a whopping 22.7GB total capacity -- the most ever offered in a single DASD.

The 3390 could accommodate as many as six of the 40kg, 3000RPM hard drives in the video above and transfer data at 4.2MB per second between its 11-inch plates. This might not seem like much, but the 3390 was 40 per cent faster with 15 per cent less latency than its competitors, offered three times the storage capacity per square foot than its predecessor, the 3380K, and lowered the cost per megabyte by nearly 20 per cent. What's more, it was extremely reliable as well thanks to a protective cloud of Halon that permeated the 3390's sealed drives -- a feature of great interest to the banks and other large institutions that regularly employed DASDs to hold valuable data until it was transcribed to tape.

This reliability came at a steep price however. The 3390 retailed for between $US90,000 and $US275,000 apiece (in 1989 dollars) and most setups required at least three DASDs, which works out to about $US50,000 per gigabyte. [Extreme Tech - Wikipedia - IBM]



    Cant stand the guy's voice

      Agreed. I just had to turn the sound down. I think it's the rise at the end of each sentence, like it's a question. Impressively built hard disk though. But I don't think this vid needed to be 40mins long.

        "I think it's the rise at the end of each sentence, like it's a question."
        Fortunately for you, you can click stop. My wife does this without knowing.. I cant click stop :(

          Is she from Adelaide? It seems to be a South Australian thing.

      Indeed! Someone how this twit thinks that by pushing the okka angle it bit with the high-pitched upward inflections and jokes about his thongs that his potential international audience will fall in love with him...

    Can't beat the 10MB HDD our high school had, about the same cost as that, it was owned by BHP until the school got it. It was a lot bigger than that and if I remember correctly, it only had one disc.

    That and someone forgot to tell him the content was targeted at "grown-ups."

    Real hard drive... HA!
    Try looking at a 288mb top loading disk pack and a drive unit the size of a 5kg washing machine...
    Ah those were the

    Nice skin tight black shirt too...! lol

    How much did it cost again?? I forgot since the last 250,000 times you told us.

    This guys info is all wrong. Capacity, price, dates. Check the mfgr site

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