Date: Sun, 19 Sep 1999 19:13:38 -0700 (PDT) From: "Rodney W. Grimes" <freebsd@gndrsh.dnsmgr.net> To: grog@lemis.com (Greg Lehey) Cc: phk@critter.freebsd.dk (Poul-Henning Kamp), green@FreeBSD.org (Brian F. Feldman), cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org Subject: Re: cvs commit: src/usr.bin/systat vmstat.c Message-ID: <199909200213.TAA56998@gndrsh.dnsmgr.net> In-Reply-To: <19990920101545.U55065@freebie.lemis.com> from Greg Lehey at "Sep 20, 1999 10:15:45 am"
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> On Sunday, 19 September 1999 at 11:46:17 -0700, Rodney W. Grimes wrote: > >> In message <199909191837.LAA55732@gndrsh.dnsmgr.net>, "Rodney W. Grimes" writes > >> : > >> > >>>> Or as IBM did many years ago "rotating platter mass storage device" :-) > >>> > >>> I thought there international work for Disc was ``Direct Access Storage > >>> Device'' abbreviated as ``DASD'', pronounced as in DazzDee :-). > >> > >> I don't think that got used over here around '90 or so. There were > >> also various conflicing terminologies, mostly one per on product line > >> (series/1 vs 3x vs 3[67]0 etc etc). > > > > DASD was post 370 terminology, started about the time of the 3082/84 > > series so 1990 would be about right for when IBM started to use it. > > I have here a book entitled "IBM 360 Assembler Language Programming", > published by Wiley in 1970. On page 409, at the beginning of the > chapter entitled "Direct Access Storage Devices (DASD)", I read > > DASDs available for System 360 are listed below. > > 1. Drive with removable disk packs: 2311 and 2314. > 2. Drive with non-removable disk packs: 2302. > 3. Drum: 2301 and 2303. > 4. Data Cell drive: 2321. Your looking at technical manuals, yes, DASD has been in use there for eons, I could probably find reference to it in 1401 documentation circa 1964. But it was much much much later that IBM stated calling it DASD in marketing data, as no one outside the technical crowd knew what it was. You'll also note that my circa 1969 ``Programming the IBM 1130'', published by Wiley in 1969 makes no mention at all of DASD, uses the word disk extensivly and references the model 2310 disk cartridge drive (immediate predicessor to the 2311.) > > There's very little mention of the word disk in the chapter (and none > of the alternative "disc"). I don't think that the term was new at > the time the book was written. > > Greg > -- -- Rod Grimes - KD7CAX - (RWG25) rgrimes@gndrsh.dnsmgr.net To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe cvs-all" in the body of the message
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