Author Topic: Think all the early pre-IBM PC hard drives were 5-10MB tops?  (Read 3835 times)

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Offline Rasz

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Re: Think all the early pre-IBM PC hard drives were 5-10MB tops?
« Reply #25 on: March 08, 2019, 04:57:29 pm »
Also, you misquoted him: The "bulky, noisy, so much storage" comment was referring to a 1.2GB SCSI drive which he added to that machine in 1996.

Thats what I meant to underline with my quote, in 1996 brand new standard PC HDD was quiet and cool ~1GB 3.5 IDE at ~$200
Building PC case sized loud contraption was highly un-optimal to say the least. In 1992 tho it would be around $2000 for 1GB SCSI drive.
« Last Edit: March 08, 2019, 05:23:20 pm by Rasz »
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Offline AndyC_772

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Re: Think all the early pre-IBM PC hard drives were 5-10MB tops?
« Reply #26 on: March 08, 2019, 09:16:55 pm »
Geez, either read the story and enjoy it, or ignore it and move on.  :palm:

Offline james_s

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Re: Think all the early pre-IBM PC hard drives were 5-10MB tops?
« Reply #27 on: March 09, 2019, 02:01:04 am »
I finally got one of those drives around then too, must have been around 1996, the place where my friend's brother worked was cleaning out a storage room and disposing of a bunch of old computer gear so naturally I was happy to help out. I put it in a Gateway 486-66 that came from the same haul and stuck that under my brother's bed to use as a server. Yeah modern drives for a couple hundred bucks would have held as much, but I was a broke teenager living with a single parent, a couple hundred bucks was about what I could scrape together in a year at the time. I made due with what I could get for free. The education I got by screwing around with all that old stuff was priceless though.
 
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Online schmitt trigger

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Re: Think all the early pre-IBM PC hard drives were 5-10MB tops?
« Reply #28 on: March 12, 2019, 01:50:49 pm »
"The education I got by screwing around with all that old stuff was priceless though."

It is actually the best technical education a curious young man can have.
I did not screw with computers, but radios and amplifiers. Tubed ones.
 

Offline rambobrite

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Re: Think all the early pre-IBM PC hard drives were 5-10MB tops?
« Reply #29 on: March 23, 2019, 12:01:46 am »
I had one of the TRS-80 "five meg disk subsystems" for my Model I. I kind of miss having a key-based power switch, and a big bright write-protect button. But not the jet-engine sound of it spinning up.
 

Offline Sam Hobbs

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Re: Think all the early pre-IBM PC hard drives were 5-10MB tops?
« Reply #30 on: August 02, 2019, 01:47:18 am »
The title is confusing for me. Is it referring to pre-release IBM PCs? That is confusing for me since the first IBM PCs did not have hard drives (not even soft drives). If it is referring to computers prior to the IBM PC then that is confusing because I did not hear the term Personal Computer before the IBM PC; the common terms were things like micro-computer. I think you are referring to micro-computers but it took me a while to decide that.
 

Offline Sam Hobbs

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Re: Think all the early pre-IBM PC hard drives were 5-10MB tops?
« Reply #31 on: August 02, 2019, 03:02:31 am »
Does anybody know the background for the HD moniker “Winchester”?

Someone had explained it too me many, many moons ago. It was somehow related to the caliber of the famous rifle, but can’t remember the complete story.
I will first tell you what I remember being told. What I remember is that Winchester is a technology and the primary feature of the technology is that the platters and the heads are all contained in an air-tight unit. Prior to Winchester technology the platters were separate and removable. (One of the tasks I performed in the Army in 1976 was to load up spindles into my car and take them from the Pentagon to a Naval station to get them degaussed.) Prior to Winchester technology the platters and heads were very sensitive; just smoke from a cigarette could damage them.

Now if you try to find that in the Wikipedia then you will get a different story. One article implies that the name originally was a code name for just one model of IBM drive.

The explanation for why the name Winchester was chosen is also not clear (from the Wikipedia at least). One explanation is that it is the name of a street. However the name of the street is related to Winchester rifles so rifles seem related even if it was indirect.
 

Offline Sam Hobbs

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Re: Think all the early pre-IBM PC hard drives were 5-10MB tops?
« Reply #32 on: August 02, 2019, 03:07:01 am »
https://en.wikipedia.org/wiki/History_of_IBM_magnetic_disk_drives#IBM_3340
The significance of a particular code name of IBM DASD was its ability to land the head on the disk surface when it spun down. Contemporary drives had emergency head retract devices to prevent the heads from crashing when they lost lift force. This was universally adopted in later models, and is the reason the IBM PC BIOS has a Landing Zone Cylinder (LZ) parameter.
Actually the retraction feature was a spring. When power was off the spring would pull the heads back. Without a spring the heads needed to be parked explicitly. The XT and AT PCs had a BIOS capability to park the heads. If the heads were not parked explicitly then the heads and platters were very vulnerable.
 

Offline Sam Hobbs

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Re: Think all the early pre-IBM PC hard drives were 5-10MB tops?
« Reply #33 on: August 02, 2019, 03:09:10 am »

From https://en.wikipedia.org/wiki/History_of_IBM_magnetic_disk_drives#IBM_3340:
Quote
The 3340 was developed in San Jose under the leadership of Ken Haughton. Early on the design was focused on two removable 30 megabyte modules. Because of this 30/30 configuration, the code name Winchester was selected after the famous Winchester .30-30 rifle; subsequently the capacities were increased, but the code name stuck.
Sorry for my previous post but the Wikipedia is not so clear ion other places.
 

Offline helius

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Re: Think all the early pre-IBM PC hard drives were 5-10MB tops?
« Reply #34 on: August 07, 2019, 09:41:46 pm »
You can edit your posts if you need to add anything; that's far better than posting four times in a row.
 


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