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    WS Lounge VIP access-mdb's Avatar
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    Cray disk drives

    I've just been scanning in some of my old photographs, and have some of a new Cray YMP8/864 being delivered and installed to my then place of work. I also have a couple of photos of some disk drives - Cray DD-49s - there's 12 of them with space for 4 more to be installed. Each one is 1.2Gb capacity - and as far as I can establish, they are SSDs, though I may be wrong there. Certainly SSDs are mentioned at this time. These photos date from 1991 - I hadn't realised that SSDs were so old!

    The cost of this ~19Gb array was six figures but they were fast!

    And the Cray was a supercomputer with the capability of crunching lots of numbers.

    It was said at that time that the Cray was the most expensive seat in the world - the design had what looked like a seat around it and they put cushions on some models!

    I've attached some of the pics
    Cray_YMP8832.png Cray_YMP8864.png DD-49.png

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    Super Moderator CLiNT's Avatar
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    They are unlikely to be SSDs and the term "fast" would have been relative to the date of 1991.
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    Super Moderator BATcher's Avatar
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    We routinely bought shed-loads* of 15000 rpm SCSI disks which (unsurprisingly) were extremely fast, and cost a diplomat's ransom. I seem to remember we used RAID-5 with 20-32 disks in a rack. In those days the Compaq SCSI controller card cost about £2.5K.

    *actually cabinet-loads
    BATcher

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    5 Star Lounger RussB's Avatar
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    NICE!, Thanks for sharing this piece of history with us.
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    Super Moderator jwitalka's Avatar
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    From https://en.wikipedia.org/wiki/Cray_X-MP

    The DD-39 and DD-49 hard drives made by Ibis with a raw transfer rate of 13.3 MB/s each stored 1200 megabyte (blocked and formatted) with 5.9 MB/s and 9.8 MB/s transfer rates (unstriped), respectively. Optional solid state drives were available with 256, 512 or 1024 MB capacities with transfer rates of 100 to 1,000 MB/s per channel. Up to 38 gigabytes of data storage was possible.
    Jerry

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    Silver Lounger wavy's Avatar
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    Quote Originally Posted by access-mdb View Post
    Each one is 1.2Gb capacity - and as far as I can establish, they are SSDs, though I may be wrong there.
    That PDF was not searchable must be all an image. The use of the term seems to be in contrast to disk drives, could it be the Cray equivalent to Ram?

    BTW if Apple were into Main Frames maybe they would have looked like the Crays. Cool!!

    David

    Just because you don't know where you are going doesn't mean any road will get you there.

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    WS Lounge VIP access-mdb's Avatar
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    But David, how would you fit one in your pocket....?

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    WS Lounge VIP access-mdb's Avatar
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    Here's a pic of another supercomputer. Question is, who attached all the cables? And how did you know which was which?

    I0509.png

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    4 Star Lounger
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    I used to have techno-lust for Cray hardware!

    RIP Seymour Cray.

  10. #10
    WS Lounge VIP access-mdb's Avatar
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    Quote Originally Posted by BHarder View Post
    I used to have techno-lust for Cray hardware!

    RIP Seymour Cray.
    It wasn't a Cray this time - but can you guess what?

    Am I allowed to highjack my own thread - in Scuttlebutt?

  11. #11
    Silver Lounger wavy's Avatar
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    Quote Originally Posted by access-mdb View Post
    But David, how would you fit one in your pocket....?
    I was thinking of slinging a hammock between the towers, should keep one warm in the cold weather...
    David

    Just because you don't know where you are going doesn't mean any road will get you there.

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    Silver Lounger wavy's Avatar
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    Quote Originally Posted by access-mdb View Post
    Here's a pic of another supercomputer. Question is, who attached all the cables? And how did you know which was which?

    I0509.png
    Good job security for the one who knows.

    PBX ??

    David

    Just because you don't know where you are going doesn't mean any road will get you there.

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    4 Star Lounger
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    When You Buy A 1TB Hard Disk From China But Itís Only 32GB...

    wrong-sized-hard-drive.jpg

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    Silver Lounger wavy's Avatar
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    I don't see a connection to those gold thingies, must just be there for weight.
    David

    Just because you don't know where you are going doesn't mean any road will get you there.

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    4 Star Lounger
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    Quote Originally Posted by wavy View Post
    I don't see a connection to those gold thingies, must just be there for weight.
    They're Rawlbolts, and yes.

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