When at Burroughs in the 70's we had a B3500 that pretty much sat unused. Can't remember why we had such a oldie other than it was free and the raised floor room it was in had the space. It had a ? drum. Can't remember the size or speed, I never used the B3500, I worked graveyard and had 3x2 (3 CPUs, 2 I/O) B6700 at my disposal, if it was being used there was a B4700 that in the years I was there was never used past about 6 PM.
I miss the days when hitting the power switch and hearing contactors closing in sequence. B6700 http://www.retrocomputingtasmania.com/home/projects/burroughs-b6700- mainframe -pete On Wed, Dec 20, 2017 at 9:55 AM, Seymour J Metz <[email protected]> wrote: > The difference between a disk and a drum is geometry, not functionality. A > drum has a solid cylinder while a disk drive has flat platters. > > > -- > Shmuel (Seymour J.) Metz > http://mason.gmu.edu/~smetz3 > > ________________________________________ > From: IBM Mainframe Discussion List <[email protected]> on behalf > of ITschak Mugzach <[email protected]> > Sent: Wednesday, December 20, 2017 12:52 PM > To: [email protected] > Subject: Re: Can anyone remember "drum" storage? > > Crum! That the name i tried to recall. It was a flat disk. Same > functionality, different face. > > ITschak > > בתאריך 20 בדצמ׳ 2017 7:50 אחה״צ, "Seymour J Metz" <[email protected]> כתב: > > > There was no disk on NCR CRAM.. > > > > > > -- > > Shmuel (Seymour J.) Metz > > http://mason.gmu.edu/~smetz3 > > > > ________________________________________ > > From: IBM Mainframe Discussion List <[email protected]> on behalf > > of ITschak Mugzach <[email protected]> > > Sent: Wednesday, December 20, 2017 12:23 PM > > To: [email protected] > > Subject: Re: Can anyone remember "drum" storage? > > > > The second computer I worked on (the first one was IBM 360) was NCR RMC > > 315. It had a drum disk that read coated cards coshed by a combination of > > the sticks it was hanged on. when cards did fall down, we used a pencil > to > > help it... Unpleasant noise they made then ;-) Don't know how many heads > it > > used to read a card... > > > > ITschak > > > > On Wed, Dec 20, 2017 at 7:12 PM, Paul Gilmartin < > > [email protected]> wrote: > > > > > On Wed, 20 Dec 2017 07:08:40 -0600, John McKown wrote: > > > > > > >It's not really a drum, but it is getting closer. Of course, for true > > > >speed, one should go SSD. > > > > > > > >http://secure-web.cisco.com/1DHgb8A1qnxL_q0R_ > > 7UcfYYlqprY1cFUfcuCknoztJbnARFqU5ToFF1_X0wBFenSvZL4u1gdZz30pBQGWxDria > > TQp7BvOrVvHQGGadK7x3Y_XY-EaXaq0_oayYrerLu3Yk8SUUMeKNF0F_sDSVO1mKjkd_ > > GWAmjksMQDqaSVEqBZ0ZXWfXp-YhIqmQw7APTAKyVsaF-2dWZbO_ > > Msn9R5aEN68FvTOQpkCj8oDr0TIPHTN2mk4x-vCqhTJDrPmAjzfZm5MOpVmWvsTQUCN > > ltmIlvEWFqERRbHGbZkDyNJ9-Mk6nX7IXzEGndv4YaMpNmYVeZ6en5x > > 6zeNbEN5WYf1wFycyU3sHXGbVVFH0kA4xdGk5g1wspH-mVTHJXHvuUm86/ > > http%3A%2F%2Fhttp://secure-web.cisco.com/166MPfESagNJi0kFFYw49O1jvfTuSa > XTMb1ygyQqapeYWeKi29DOEQUimcygRUblUlx4NEqM84rJOX- > uvhr9G60tcNZwfVcuovhJYasOyKnhOthcY_ugbO_0yj1B3dRNkOPkIcIbCw9iXCe96Qtjv > EQNjNigsKnhO_ZPcg0Jvwv8ANusEv3PqXGdthQ_mfOMUT5QPxQ-g22HGoX- > 66k0SyG7kcVg0y53-xXbGy71qdRw8krw4m35gT2Iipw3qMG > RW9jphtnUl-C9Jd4zL1WuVM7KV_hg-sXus7K9MFkinWwcePrLvQmlTvEhcQP > tPeIWxbfhjYXYONBIXEavnAoQmUTKFIGpLvoNQ3OmXaAaW0JBH_ > MDxOXghPcWQk551F9z8Sx1qLFLGEfOEqhOzLR4ZCMa2x7NLWnHgh9OTFD4tX > fBSjG96vTRdcf93QZJHYQiQ/http%3A%2F%2Fwww.theregister.co.uk% > 2F2017%2F12%2F19%2Fseagate_disk_drive_ > > > multi_actuator/ > > > > > > > >[quote] > > > > > > > >Seagate is increasing IO performance in disk drives by separating > > > >read-write heads into two separate sets which can operate > independently > > > and > > > >in parallel. > > > > > > > In contrast, the StorageTek SuperDisk had 4 spindles served by a single > > > X-shaped actuator. It sold poorly at first because the medium wasn't > > > removable. Then IBM introduced a drive (33xx?) with permanent medium > > > which somewhat legitimized the market for StorageTek. > > > > > > There's a legend ("Navy story") of a Univac Fastrand drum mounted on a > > > ship. > > > The ship made a sharp turn and gyroscopic torque pulled the mounting > > bolts > > > out of the deck. > > > > > > -- gil > > > > > > ---------------------------------------------------------------------- > > > For IBM-MAIN subscribe / signoff / archive access instructions, > > > send email to [email protected] with the message: INFO IBM-MAIN > > > > > > > > > > > -- > > ITschak Mugzach > > *|** IronSphere Platform* *|** Automatic ISCM** (Information Security > > Contiguous Monitoring) **| * > > > > ---------------------------------------------------------------------- > > For IBM-MAIN subscribe / signoff / archive access instructions, > > send email to [email protected] with the message: INFO IBM-MAIN > > > > ---------------------------------------------------------------------- > > For IBM-MAIN subscribe / signoff / archive access instructions, > > send email to [email protected] with the message: INFO IBM-MAIN > > > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to [email protected] with the message: INFO IBM-MAIN > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to [email protected] with the message: INFO IBM-MAIN > > ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
