There was no disk on NCR CRAM..
-- Shmuel (Seymour J.) Metz http://mason.gmu.edu/~smetz3 ________________________________________ From: IBM Mainframe Discussion List <IBM-MAIN@listserv.ua.edu> on behalf of ITschak Mugzach <imugz...@gmail.com> Sent: Wednesday, December 20, 2017 12:23 PM To: IBM-MAIN@listserv.ua.edu 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 < 0000000433f07816-dmarc-requ...@listserv.ua.edu> 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_X0wBFenSvZL4u1gdZz30pBQGWxDriaTQp7BvOrVvHQGGadK7x3Y_XY-EaXaq0_oayYrerLu3Yk8SUUMeKNF0F_sDSVO1mKjkd_GWAmjksMQDqaSVEqBZ0ZXWfXp-YhIqmQw7APTAKyVsaF-2dWZbO_Msn9R5aEN68FvTOQpkCj8oDr0TIPHTN2mk4x-vCqhTJDrPmAjzfZm5MOpVmWvsTQUCNltmIlvEWFqERRbHGbZkDyNJ9-Mk6nX7IXzEGndv4YaMpNmYVeZ6en5x6zeNbEN5WYf1wFycyU3sHXGbVVFH0kA4xdGk5g1wspH-mVTHJXHvuUm86/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 lists...@listserv.ua.edu 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 lists...@listserv.ua.edu with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
