29 Feb
2004
29 Feb
'04
2:09 p.m.
I picked this disk up the other day knowing almost nothing about
mainframe storage methods. I've spent hours upon hours trying to figure
out what exactly this is but the closest thing I can get to it is an
RL02 removable cartridge disk, but it's not (I think)! I don't see how
the same drive could read these since the holes are so much different,
but it's the same general idea.
I'm not sending attachments, I put them on a
site for you to look at, the url is http://www.spiritsphere.com/14inchdisk.html ,
any and all information you could give me about this disk would be
greatly appreciated, I'm still in the dark about it, and have found very
little reference at all to CDC ever making a cartridge like this.
Thank you!
Best Wishes :)
Tim
1 Mar
1 Mar
1:02 a.m.
Tim,
That appears to be a fairly common disk pack as used in drives such as
an DEC RK05 and similar. There were a number of drive manufactures who
used that style of disk pack. The number of notches (sector markers) in
the bottom metal hub ring will give a better idea of what machine the
pack was likely used with. Also, if there is a density marking, that
would also help.
--tom
At 11:09 PM 2/29/2004 -0500, you wrote:
I picked this disk up the other day knowing almost
nothing about
mainframe storage methods. I've spent hours upon hours trying to figure
out what exactly this is but the closest thing I can get to it is an
RL02 removable cartridge disk, but it's not (I think)! I don't see how
the same drive could read these since the holes are so much different,
but it's the same general idea.
I'm not sending attachments, I put them on a
site for you to look at, the url is
http://www.spiritsphere.com/14inchdisk.html ,
any and all information you could give me about this disk would be
greatly appreciated, I'm still in the dark about it, and have found very
little reference at all to CDC ever making a cartridge like this.
Thank you!
Best Wishes :)
Tim
1:36 a.m.
Tom Uban wrote:
That appears to be a fairly common disk pack as used
in drives such as
an DEC RK05 and similar.
It definitely isn't similar to any RK05 disk pack I ever saw.
But there are a lot of non RK05 14" disk drives.
There were a number of drive manufactures who
used that style of disk pack. The number of notches (sector markers) in
the bottom metal hub ring will give a better idea of what machine the
pack was likely used with.
The RK05 packs are available with 12 (for pdp11) and 16 (for pdp8)
sectors (13 or 17 notches).
Just my 2 cents
Gerold
1:20 a.m.
Neko wrote:
I think, those disks have been used e.g. in CDC 9448 Phoenix Cartridge
drives.
- Andreas
1:28 a.m.
Tim,
Interesting disk. Do you have any photos with a ruler alongside to show the
dimensions?
Lee C.
-----Original Message-----
From: cctalk-bounces(a)classiccmp.org
[mailto:cctalk-bounces@classiccmp.org]On Behalf Of Neko
Sent: Sunday, February 29, 2004 8:10 PM
To: cctech(a)classiccmp.org
Subject: Strange Old Disk
I picked this disk up the other day knowing almost nothing about
mainframe storage methods. I've spent hours upon hours trying to figure
out what exactly this is but the closest thing I can get to it is an
RL02 removable cartridge disk, but it's not (I think)! I don't see how
the same drive could read these since the holes are so much different,
but it's the same general idea.
I'm not sending attachments, I put them on a
site for you to look at, the url is
http://www.spiritsphere.com/14inchdisk.html ,
any and all information you could give me about this disk would be
greatly appreciated, I'm still in the dark about it, and have found very
little reference at all to CDC ever making a cartridge like this.
Thank you!
Best Wishes :)
Tim
1:42 a.m.
Tim & Lee,
I'm sorry about my previous post. I didn't notice that the pictures had
larger versions if I clicked on them. That is not an RK05 style pack as
I originally thought. Also, if the hand in the one picture is any measure
of scale, the pack looks like it may be smaller than a normal 14" platter.
A little google searching turns up the model number and implies that it
is compatible with a Wang 2280 disk pack if that is any help.
--tom
At 07:28 AM 3/1/2004 -0800, you wrote:
Tim,
Interesting disk. Do you have any photos with a ruler alongside to show the
dimensions?
Lee C.
> -----Original Message-----
> From: cctalk-bounces(a)classiccmp.org
> [mailto:cctalk-bounces@classiccmp.org]On Behalf Of Neko
> Sent: Sunday, February 29, 2004 8:10 PM
> To: cctech(a)classiccmp.org
> Subject: Strange Old Disk
>
>
> I picked this disk up the other day knowing almost nothing about
> mainframe storage methods. I've spent hours upon hours trying to figure
> out what exactly this is but the closest thing I can get to it is an
> RL02 removable cartridge disk, but it's not (I think)! I don't see how
> the same drive could read these since the holes are so much different,
> but it's the same general idea.
>
> I'm not sending attachments, I put them on a
> site for you to look at, the url is
> http://www.spiritsphere.com/14inchdisk.html ,
> any and all information you could give me about this disk would be
> greatly appreciated, I'm still in the dark about it, and have found very
> little reference at all to CDC ever making a cartridge like this.
> Thank you!
>
>
> Best Wishes :)
> Tim
1:32 a.m.
Looks like an DecPack RK05 just a different color.
Curt
Neko wrote:
I picked this disk up the other day knowing almost
nothing about
mainframe storage methods. I've spent hours upon hours trying to figure
out what exactly this is but the closest thing I can get to it is an
RL02 removable cartridge disk, but it's not (I think)! I don't see how
the same drive could read these since the holes are so much different,
but it's the same general idea.
I'm not sending attachments, I put them on a
site for you to look at, the url is http://www.spiritsphere.com/14inchdisk.html ,
any and all information you could give me about this disk would be
greatly appreciated, I'm still in the dark about it, and have found very
little reference at all to CDC ever making a cartridge like this.
Thank you!
Best Wishes :)
Tim
--
Curt Vendel & Karl Morris
-----------------------------------------------------------------------
The Atari Museum
http://www.atarimuseum.com
The Atari Explorer
http://www.atari-explorer.com
2 Mar
2 Mar
2:18 p.m.
It is most definitely not an RK05...
Megan Gentry
Former RT-11 Developer
+--------------------------------+-------------------------------------+
| Megan Gentry, EMT/B, PP-ASEL | email: mbg at world.std.com |
| Member of Technical Staff | megan at savaje.com |
| SavaJe Technologies, Inc. | (s/ at /@/) |
| 100 Apollo Drive | URL: http://world.std.com/~mbg/ |
| Chelmsford, MA 01824 | "pdp-11 programmer - some assembler |
| (978) 256 6521 (DEC '77-'98) | required." - mbg KB1FCA |
+--------------------------------+-------------------------------------+
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7 comments
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participants (7)
-
asholz＠topinform.de -
curt＠atarimuseum.com -
gerold.pauler＠gmx.net -
lcourtney＠mvista.com -
mbg＠TheWorld.com -
tim＠spiritsphere.com -
uban＠ubanproductions.com