Does anyone have any info on this?
Posted by skinofsatan@reddit | vintagecomputing | View on Reddit | 16 comments
I found this old storage platter at a secondhand and thought it was interesting. It was only 50 cents so I grabbed it. I haven’t been able to find any info on it. Does anyone know some history behind it and if it holds any value?
AwkwardSpread@reddit
The enclosed disk illustrates the evolution of IBM Direct Access Storage Devices (DASD). The darkened areas represent the space required to store equivalent amounts of informa-tion. The amount of data represented by each area approximates one single spaced typewritten page, roughly 3,600 bytes. Today, one square inch of an IBM 3390 disk surface can store over 2,000 typewritten pages which is more data than is found in a typical volume of an encyclopedia. A single IBM 3390 DASD can store as much information as 4,500 IBM 350 RAMACs, the first DASD introduced by IBM in 1956.
IBM's General Products Division (GPD) developed these disk drives in San Jose, California. This division has worldwide development and U.S. manufacturing responsibility for high-performance information storage systems including disk, magnetic tape, optical storage devices and related programming.
il_biggo@reddit
Nice job, ChatGPT 🙄
BigPeteB@reddit
OP asked if you know any history about this or what its value is. Not for you to type out the text on the box, which we can presume OP has already read and found insufficient, hence why they're asking questions to learn more.
skinofsatan@reddit (OP)
Thanks a lot for the info! Cool to know :)
BigPeteB@reddit
I know this is your first post, but with an account that's 9 months old, I'd think by now you'd understand that Reddit discussions are threaded. You didn't reply to the person who gave you info, you just made a separate reply to your own post that the person you wanted to reply to won't see.
skinofsatan@reddit (OP)
Sorry I just found out how to reply I haven’t really made any posts before or used reddit I’m just learning 😅
BigPeteB@reddit
Well, at least you got it right with this one. 👍🏻
19chris1996@reddit
22.7 Megabytes.
Kurgan_IT@reddit
Cool find, it's a marketing item, and I'm quite sure it's rare. I'd make a little picture frame with this.
MUI-VCP@reddit
I have a similar one (without the black lettering). It was taken from a working unit many years ago. It has a visible head crash scored 3/4 around the perimeter. I made it into a clock and its currently in my workshop on the wall.
OldDiehl@reddit
^ This. I remember seeing one of these back sometime in the early 90's. We got our first 3390 in 90 or 91 (can't remember exactly - I've slept since then).
International-Pen940@reddit
They sell frames to display vinyl albums and the dust jackets (probably for CDs too). I think it would be cool to do that.
skinofsatan@reddit (OP)
For example who it was distributed to?
ussaro@reddit
Zero information on the Internet about this, and I couldn’t find it for sale. There’s a book explaining the early line of DASD with some really cool details http://bitsavers.informatik.uni-stuttgart.de/pdf/ibm/dasd/GC20-1649-8_Introduction_to_IBM_Direct-Access_Storage_Devices_and_Organization_Methods_197402.pdf.
If I had to guess, it was the kind of thing IBM people would give to close corporate customers and partners.
RemarkablePumpk1n@reddit
Thats aimed at the mid range aka s36/38/as400 and upwards so the Z series mainframes customer base looking at the drive model numbers.
siliconsandwich@reddit
Idk what you could want to know that isn’t written on the sleeve there, it’s just an infographic for promo purposes.