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  • OT Identify this disk Pack?

    From CRNG@21:1/5 to All on Wed Aug 10 07:15:33 2016
    XPost: alt.msdos.batch.nt

    OT Identify this disk Pack?

    I am posting this question to several NGs where expert "old timers"
    familiar with computing in the late 1970s are likely to be found. I
    hope someone can help identify the disk pack shown in these two
    photos:

    https://pix.sfly.com/BTopxs

    The pack was used with a DEC PDP-11 from around 1976 to 1982 when the
    PDP-11 was decommissioned. I saved the pack as a souvenir, but now I
    can't remember what it's storage capacity was :-(

    The pack is 15" in diameter and about 1.5" thick in the center and
    about 1" thick at the circumference. It has a steel platter in it
    about 1/8" thick covered on both sides with brown magnetic coating.
    The label on it says: Front Loading Cartridge Precision Methods Inc.

    Does anyone recall these and have an idea what their storage capacity
    was?

    Thanks
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    Web based forums are like subscribing to 10 different newspapers
    and having to visit 10 different news stands to pickup each one.
    Email list-server groups and USENET are like having all of those
    newspapers delivered to your door every morning.
    --
    Web based forums are like subscribing to 10 different newspapers
    and having to visit 10 different news stands to pickup each one.
    Email list-server groups and USENET are like having all of those
    newspapers delivered to your door every morning.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Herbert Kleebauer@21:1/5 to CRNG on Wed Aug 10 17:23:01 2016
    XPost: alt.msdos.batch.nt

    On 10.08.2016 14:15, CRNG wrote:
    OT Identify this disk Pack?

    I am posting this question to several NGs where expert "old timers"
    familiar with computing in the late 1970s are likely to be found. I
    hope someone can help identify the disk pack shown in these two
    photos:

    https://pix.sfly.com/BTopxs


    http://www.pdp8.net/rk05/pics/pack.shtml?med
    https://en.wikipedia.org/wiki/RK05

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From CRNG@21:1/5 to jj4public@vfemail.net on Wed Aug 10 14:34:07 2016
    XPost: alt.msdos.batch.nt

    On Wed, 10 Aug 2016 23:33:11 +0700, JJ <jj4public@vfemail.net> wrote
    in <nj9bojmp3q7p.16wxrc52zxhgr$.dlg@40tude.net>

    Just searched them with Bing Image search and found it on below page (6th >row). It states that it's "approximately 28MB", but it isn't clear whether >the unit is MB or MiB.

    <http://q7.neurotica.com/Oldtech/Media/RigidDisk.html>

    Thanks JJ (and Herbert). From the above link it looks like a 2.5Mb
    RK05 to me.
    --
    Web based forums are like subscribing to 10 different newspapers
    and having to visit 10 different news stands to pickup each one.
    Email list-server groups and USENET are like having all of those
    newspapers delivered to your door every morning.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From JJ@21:1/5 to CRNG on Wed Aug 10 23:33:11 2016
    XPost: alt.msdos.batch.nt

    On Wed, 10 Aug 2016 07:15:33 -0500, CRNG wrote:
    OT Identify this disk Pack?

    I am posting this question to several NGs where expert "old timers"
    familiar with computing in the late 1970s are likely to be found. I
    hope someone can help identify the disk pack shown in these two
    photos:

    https://pix.sfly.com/BTopxs

    The pack was used with a DEC PDP-11 from around 1976 to 1982 when the
    PDP-11 was decommissioned. I saved the pack as a souvenir, but now I
    can't remember what it's storage capacity was :-(

    The pack is 15" in diameter and about 1.5" thick in the center and
    about 1" thick at the circumference. It has a steel platter in it
    about 1/8" thick covered on both sides with brown magnetic coating.
    The label on it says: Front Loading Cartridge Precision Methods Inc.

    Does anyone recall these and have an idea what their storage capacity
    was?

    Thanks

    Just searched them with Bing Image search and found it on below page (6th
    row). It states that it's "approximately 28MB", but it isn't clear whether
    the unit is MB or MiB.

    <http://q7.neurotica.com/Oldtech/Media/RigidDisk.html>

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)