Nagered hard drive;'(..
in [Computer]
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From: Bob Eager on 25 Jun 2010 07:49 On Fri, 25 Jun 2010 09:50:13 +0000, Huge wrote: > On 2010-06-24, Bob Eager <rde42(a)spamcop.net> wrote: >> On Thu, 24 Jun 2010 21:00:23 +0000, Huge wrote: >> >>> On 2010-06-24, Roland Perry <roland(a)perry.co.uk> wrote: >>>> In message <hvvpji$gsj$2(a)news.eternal-september.org>, at 14:20:35 on >>>> Thu, 24 Jun 2010, Jules Richardson >>>> <jules.richardsonnewsmoo(a)gmail.com> remarked: >>>>>(and remember the days when you had to reformat the drive if you >>>>>changed its orientation, as otherwise it'd start spewing out errors >>>>>all over the place? :-) >>>> >>>> No, I don't remember that, and I go back all the way to 1980 >>> >>> Pah. Newbie. >>> >>>> and drives >>>> that were 10MB per platter. >>> >>> Blimey. Huge capacity. There's a platter from a Xerox system hanging >>> on my study wall. IIRC, the drive was 20Mb and had 5 platters. I wish >>> I could remember what the capacity of the DEDS drive on the ICL 1900 >>> series I learned RPG2 (spit) on was. About 5 Mb (?), with two platters >>> that had to be exchanged seperately, but in pairs, on a horizontal >>> spindle inside a *huge* grey crackle-finish enclosure. >>> >>> Now I have 3.5 Tb of disk in mys study ... >> >> The disks on the ICL 4130 at Kent > > Ahh, KOS. Now, those were the days. Or perhaps not. > > (I thought it was an NCR/Elliott 4130? Or were they subsumed into ICL?) They were subsumed into ICL. All the manuals I bought had ICL on them. (I bought them to work out how the multiprogramming hardware worked, so I could (successfully) subvert it) -- Use the BIG mirror service in the UK: http://www.mirrorservice.org *lightning protection* - a w_tom conductor
From: Bob Eager on 25 Jun 2010 07:50 On Fri, 25 Jun 2010 09:56:04 +0000, Huge wrote: > You sure it was a "platter"? Only, when I worked for ITT in around > 1975/6 (on what became the Unimat 4080 telephone switch), the message > switches that we shared our computer room with definitely had drums that > were drum shaped. This kind of thing; I'm sure, anyway. I saw them Bloody great vertically mounted platters, big strip of heads. Functionally a drum. -- Use the BIG mirror service in the UK: http://www.mirrorservice.org *lightning protection* - a w_tom conductor
From: Bob Eager on 25 Jun 2010 07:53 On Fri, 25 Jun 2010 08:04:54 +0100, dennis(a)home wrote: > "Bob Eager" <rde42(a)spamcop.net> wrote in message > news:88j13sFan9U1(a)mid.individual.net... >> On Fri, 25 Jun 2010 07:12:09 +0100, Roland Perry wrote: >> >>> In mid 70's I worked on ICL drives, including something they called a >>> "drum", which was a single-platter mounted vertically. >> >> The important point about the ICL drum was that (like the real drums >> before it) it had one head for each track, thereby reducing the seek >> time to the electronic switching time. They were mainly used for >> paging, but I seem to recall that the ICL ones were let down by a >> sluggish transfer rate. > > Real drums didn't use Winchester type heads IIRC. They were drums so all > the heads were the same and the surface speed was the same, with disks > the surface speed changes with the head position. I never said otherwise (I said "like the real drums before it"). They were however formatted with a larger number of sectors on the outer tracks to make best use of packing density. -- Use the BIG mirror service in the UK: http://www.mirrorservice.org *lightning protection* - a w_tom conductor
From: Jon Green on 25 Jun 2010 09:09 On 25/06/2010 11:00, Huge wrote: > Having recently moved my aged mother from a 3 bed house to a 1 bed flat, I > am determined to throw all the junk out. I hope you didn't mean that in the way that it reads! Jon -- SPAM BLOCK IN USE! To reply in email, replace 'deadspam' with 'green-lines'. Blog: http://bit.ly/45cLHw Pix: http://bit.ly/d8V2NJ Website: http://www.green-lines.com/
From: Roland Perry on 25 Jun 2010 10:02
In message <88jd26Fs8lU8(a)mid.individual.net>, at 10:00:38 on Fri, 25 Jun 2010, Huge <Huge(a)nowhere.much.invalid> remarked: >Having recently moved my aged mother from a 3 bed house to a 1 bed flat, I >am determined to throw all the junk out. That's no way to speak about your mother! -- Roland Perry |