IBM had one like that on the 650; three arms, which moved vertically and horizontally and could each access any track. I don't know which of the related drives, e.g., 355, 1405, had three arms.
-- Shmuel (Seymour J.) Metz http://mason.gmu.edu/~smetz3 ________________________________________ From: IBM Mainframe Discussion List <[email protected]> on behalf of Tom Marchant <[email protected]> Sent: Thursday, March 22, 2018 9:30 AM To: [email protected] Subject: Re: Didn't we have this some time ago on some SLED disks? Multi-actuator On Thu, 22 Mar 2018 08:48:52 -0400, John Eells wrote: >John McKown wrote: >> https://secure-web.cisco.com/1Ny-H0J82eUTI4hG--zMt92cGYZnMAq7TZ9JoXX8asdGdNpCelJNP6ebDM5dUbyggaZ7AtZSdZOXYVjQlsmd42nYD6LbmEOaLGM9XTZ7BTV8ZTpj7Ivos2L7vTmxSQLLLuwzzolnDdSWmTRISI9z7HRn4DcOnUnEVAH-NYCUB9etrLcZu5WLL6LlpYCY-JP9qiNPka0AbPQ9qE5-BzwqCnzFZ3NdQ2LIFr3lwtxWVcHFxowv1H7Nubry3m1-8fZXBe-aFxnDioIkDKO9RrKSl6dfyW2JG3QfQFz78mUZutyt04Sq1-EtypDidpAxeZyOv78Yu_Ta4hJCS103PyfE3xVoPpdmdn27nOlK12y5gPCI3PoFc52U4tsC2JBlO82H3zukSNFwppetNZG60s9BzqeteBBQKXkVkiqpSH64NDeLfUHU9nnBoFA5CULx94eEO/https%3A%2F%2Fwww.theregister.co.uk%2F2017%2F12%2F19%2Fseagate_disk_drive_multi_actuator%2F >> > >That said, it's interesting. It would be much more interesting if both actuators could access the same surfaces, and so the same data. The way I read it the two actuators each access only their own set of recording surfaces. -- Tom Marchant ---------------------------------------------------------------------- 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
