shmuel+ibm-m...@patriot.net (Shmuel Metz , Seymour J.) writes: > The 2305-1 and 2305-2 were disks; the drums were 2301 and 2303. Unlike the > drums, the fixed-head disks had[1] 8 exposures and RPS. > > [1] AFAIK the 2305 was the first device to have multiple exposures, > RPS or 2-byte channel connections.
re: http://www.garlic.com/~lynn/2010g.html#22 Mainframe Executive article on the death of tape that was why i prefixed the lead into the email http://www.garlic.com/~lynn/2010g.html#email800710 with explanation that 2305 were physically fixed-head disks. however, it had become regular practice to refer to paging drums from the 2301 history ... and it carried over to referring to 2305 as paging drums I then repeated part of the explanation with the leadin to the immediate following email http://www.garlic.com/~lynn/2010g.html#email800804 as mentioned in earlier post in thread, I had tried to add multiple exposures for fixed-head 3350 feature ... but got shutdown by JUPITER effort in POK (which thot that they might be doing an electronic paging disk/drum) http://www.garlic.com/~lynn/2010g.html#11 Mainframe Executive article on the death of tape other posts in thread: http://www.garlic.com/~lynn/2010f.html#65 Mainframe Executive article on the death of tape http://www.garlic.com/~lynn/2010g.html#24 Mainframe Executive article on the death of tape -- 42yrs virtualization experience (since Jan68), online at home since Mar1970 ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
