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#11
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Bulkiest removable storage media?
On Wed, 13 Jun 2007 05:48:43 -0700, Tim Shoppa
wrote: [ BBC VERA] Working with the figures provided (20" diameter, 1/2" thick) and a density of steel of 7.8g/cc,I get a weight of 20kg which is like 44 pounds. (Yes, this ignores the weight of the reel itself, but it also overestimates the weight of the tape because the center of the reel is not occupied). A bit of a pain to lift up to head-height, but not a contender compared to 400 pounds! I'm glad someone reminded me of the name... I've got an article about it in a magazine *somewhere*, which is where I remembered it from. Quite where that mag is in the hundreds I've got here I don't know! -- Cheers, Stan Barr stanb .at. dial .dot. pipex .dot. com (Remove any digits from the addresses when mailing me.) The future was never like this! |
#12
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Bulkiest removable storage media?
per byte it must be some kind of flopy. Just think of a gigabyte worth
of floppies would look like. OTOH don't. Probably punched paper tape, though. |
#13
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Bulkiest removable storage media?
Walter Bushell writes:
per byte it must be some kind of flopy. Just think of a gigabyte worth of floppies would look like. OTOH don't. Probably punched paper tape, though. maybe half gigabyte .... another of the experimental ideas ... from the person responsible for 801 http://www.garlic.com/~lynn/subtopic.html#801 .... in addition to the recent mention of the 16+2 track head (i.e. single head that simultaneously would read/write 16 data tracks while tracking two servo tracks) ... old email with 16+2 track/head reference http://www.garlic.com/~lynn/2006s.html#30#email871230 in this post http://www.garlic.com/~lynn/2006s.html#30 Why magnetic drums was/are worse than disks ? some technology, sort of combination from 2321 datacell and old time disks with single arm moving between platters. it had several hundred floppies all rotating on a single (horizontal) shaft. r/w head moved back&forth along the spindle ... and when the r/w head got into position at the correct floppy ... shot of compressed air (2321 sort of had something similar as part of inserting strip back into its bin) would separate the floppies so the head could be inserted (had sort of leading thin blade that entered first). there was a problem (i don't believe was ever resolved) with the floppy material streching because of the constant spinning (this effort was in the mid-to-late 70s ... after floppies had been invented in san jose ... but before seeing use in PCs). misc. past post mentioning this large number of floppies on single spinning spindle http://www.garlic.com/~lynn/2001.html#48 Competitors to SABRE? old posts mentioning 2321 http://www.garlic.com/~lynn/2000b.html#41 How to learn assembler language for OS/390 ? http://www.garlic.com/~lynn/2001.html#51 Competitors to SABRE? http://www.garlic.com/~lynn/2001f.html#78 HMC . . . does anyone out there like it ? http://www.garlic.com/~lynn/2001l.html#63 MVS History (all parts) http://www.garlic.com/~lynn/2002.html#16 index searching http://www.garlic.com/~lynn/2002.html#22 index searching http://www.garlic.com/~lynn/2002g.html#84 Questions on IBM Model 1630 http://www.garlic.com/~lynn/2002i.html#26 : AS/400 and MVS - clarification please http://www.garlic.com/~lynn/2002m.html#40 Wanted: the SOUNDS of classic computing http://www.garlic.com/~lynn/2002o.html#3 PLX http://www.garlic.com/~lynn/2003b.html#7 Disk drives as commodities. Was Yamhill http://www.garlic.com/~lynn/2003b.html#9 Disk drives as commodities. Was Yamhill http://www.garlic.com/~lynn/2003k.html#36 What is timesharing, anyway? http://www.garlic.com/~lynn/2003n.html#39 DASD history http://www.garlic.com/~lynn/2003p.html#22 1960s images of IBM 360 mainframes http://www.garlic.com/~lynn/2004.html#5 The BASIC Variations http://www.garlic.com/~lynn/2004.html#6 The BASIC Variations http://www.garlic.com/~lynn/2004e.html#41 Infiniband - practicalities for small clusters http://www.garlic.com/~lynn/2004l.html#18 FW: Looking for Disk Calc program/Exec http://www.garlic.com/~lynn/2004p.html#0 Relational vs network vs hierarchic databases http://www.garlic.com/~lynn/2005c.html#23 Volume Largest Free Space Problem... ??? http://www.garlic.com/~lynn/2005h.html#32 Software for IBM 360/30 http://www.garlic.com/~lynn/2005t.html#50 non ECC http://www.garlic.com/~lynn/2005v.html#6 DMV systems? http://www.garlic.com/~lynn/2006c.html#46 Hercules 3.04 announcement http://www.garlic.com/~lynn/2006n.html#29 CRAM, DataCell, and 3850 http://www.garlic.com/~lynn/2006n.html#30 CRAM, DataCell, and 3850 http://www.garlic.com/~lynn/2006n.html#31 CRAM, DataCell, and 3850 http://www.garlic.com/~lynn/2006r.html#31 50th Anniversary of invention of disk drives http://www.garlic.com/~lynn/2006s.html#32 Why magnetic drums was/are worse than disks ? http://www.garlic.com/~lynn/2006v.html#31 MB to Cyl Conversion http://www.garlic.com/~lynn/2006y.html#35 The Future of CPUs: What's After Multi-Core? http://www.garlic.com/~lynn/2007b.html#19 How many 36-bit Unix ports in the old days? http://www.garlic.com/~lynn/2007e.html#38 FBA rant http://www.garlic.com/~lynn/2007e.html#51 FBA rant http://www.garlic.com/~lynn/2007e.html#64 FBA rant http://www.garlic.com/~lynn/2007f.html#64 John W. Backus, 82, Fortran developer, dies http://www.garlic.com/~lynn/2007g.html#74 The Perfect Computer - 36 bits? http://www.garlic.com/~lynn/2007l.html#49 Drums: Memory or Peripheral? |
#14
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Bulkiest removable storage media?
Stan Barr wrote:
On Tue, 12 Jun 2007 10:32:49 -0700, Tim Shoppa wrote: What's the bulkiest removable storage media? Drums etc. don't count because you don't often switch the drum (although they certainly could be heavy judging by nothing but the size of the bearings). I worked with RP06 packs and some funky optical tape reels in the past, but those were pretty measly compared to some others I have seen or heard about: .. An IMAX 3-D reel can be 350 pounds and even the projector room even has a dedicated forklift for helping load them: http://www.architectureweek.com/2002...lding_1-2.html .. An SSEC "paper tape" reel was punched-card-width stock not cut into individual cards, sprocket holed and with 78 usable columns, and a reel of it weighed 400 pounds: http://www.columbia.edu/acis/history/ssec-tape.html .. Any other bulkier examples I'm missing? .. The original BBC steel tape video recorders? Huge reels of thin steel tape, spliced by welding and grinding! .. An IMAX reel is, of course, a film reel. And the SSEC paper tape wasn't intended to be removed except to be discarded when used up - it was the memory of that one computer. Still, these examples certainly have anything I might suggest beat - I was thinking of the tape reels of the Datamatic D-1000 computer, which were *pretty* bulky, but not in this league. http://www.smecc.org/honeywell_datamatic_1000.htm 31-channel magnetic tape, 3 inches wide. John Savard |
#15
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Bulkiest removable storage media?
Anne & Lynn Wheeler wrote:
Walter Bushell writes: per byte it must be some kind of flopy. Just think of a gigabyte worth of floppies would look like. OTOH don't. Probably punched paper tape, though. .... snip ... some technology, sort of combination from 2321 datacell and old time disks with single arm moving between platters. it had several hundred floppies all rotating on a single (horizontal) shaft. r/w head moved back&forth along the spindle ... and when the r/w head got into position at the correct floppy ... shot of compressed air (2321 sort of had something similar as part of inserting strip back into its bin) would separate the floppies so the head could be inserted (had sort of leading thin blade that entered first). there was a problem (i don't believe was ever resolved) with the floppy material streching because of the constant spinning (this effort was in the mid-to-late 70s ... after floppies had been invented in san jose ... but before seeing use in PCs). Sounds like an utter horror. Somebody must have been very persuasive. -- http://www.cs.auckland.ac.nz/~pgut001/pubs/vista_cost.txt http://www.securityfocus.com/columnists/423 http://www.aaxnet.com/editor/edit043.html http://kadaitcha.cx/vista/dogsbreakfast/index.html cbfalconer at maineline dot net -- Posted via a free Usenet account from http://www.teranews.com |
#16
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Bulkiest removable storage media?
Eric Sosman wrote:
Bit Banger wrote: Eric Sosman wrote: Clay tablets? Around 5 grams per bit, I'd guess, plus or minus Finagle's Variable Constant. Probably a lot more than that, if you want adequate redundancy. I have these 15! [Whoops! *crash*] ... 10! 10 distribution media! ... and the other five get swept up and put in the ... wait for it ... ... bit bucket. By the garbage collector, no doubt. Or course, such incidents could lead to dangling styli. |
#17
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Bulkiest removable storage media?
CBFalconer wrote:
Sounds like an utter horror. Somebody must have been very persuasive. .. I never heard of an IBM peripheral like that, but I know somebody made a multi-floppy pack with something similar for the early microcomputer world. It didn't stay very popular, but it was out there for a little while. John Savard |
#18
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Bulkiest removable storage media?
Quadibloc writes:
I never heard of an IBM peripheral like that, but I know somebody made a multi-floppy pack with something similar for the early microcomputer world. It didn't stay very popular, but it was out there for a little while. well before the start of steep decline in hard disk prices (and well before cdroms) '80 Mbytes of storage for under $12k!' and other ad favorites through the years http://www.computerworld.com/action/...leId=9023 960 |
#19
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Bulkiest removable storage media?
In article ,
Anne & Lynn Wheeler wrote: '80 Mbytes of storage for under $12k!' and other ad favorites through the years Makes my purchase of a .04 gig drive for $1000 look like a bargain. |
#20
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Bulkiest removable storage media?
In article ,
Anne & Lynn Wheeler wrote: Quadibloc writes: I never heard of an IBM peripheral like that, but I know somebody made a multi-floppy pack with something similar for the early microcomputer world. It didn't stay very popular, but it was out there for a little while. well before the start of steep decline in hard disk prices (and well before cdroms) '80 Mbytes of storage for under $12k!' and other ad favorites through the years http://www.computerworld.com/action/...leBasic&articl eId=9023960 AND 30 day delivery! |
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