4 Apr
2000
4 Apr
'00
11:11 a.m.
A RP03 i'm told is a multi-platter drive for a PDP11. Does anyone know
anything else about it? How much storage are we talking about, compared to
an RK05?
Can RK05's from a PDP11 system be used on a PDP8? Do i need to find
special disk cartridges?
-Lawrence LeMay
lemay(a)cs.umn.edu
4 Apr
4 Apr
11:43 a.m.
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12:31 p.m.
Of course if you happen to have an RK05f (twice the
capacity but with a
fixed pack that is only changed by a service engineer/hacker), you do
need change the pack if you move it between a PDP8 and a PDP11.
You'll have to change the pack in an RK05j as well, it's just
easier to do in an RK05j (what with the nice door on the front
and all that)...
--
Roger Ivie
TeraGlobal Communications Corporation
1750 North Research Park Way
North Logan, UT 84341
Phone: (435)787-0555
Fax: (435)787-0516
12:46 p.m.
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2:12 p.m.
You'll
have to change the pack in an RK05j as well, it's just
easier to do in an RK05j (what with the nice door on the front
and all that)...
Yeah, but I don't consider an RK05/RK05j pack to be part of the drive,
whereas the RK05f pack of is considered to be part of its drive.
3:06 p.m.
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5 Apr
5 Apr
5:38 a.m.
You'll have to change the pack in an RK05j as
well, it's just
easier to do in an RK05j (what with the nice door on the front
and all that)...
Yeah, but I don't consider an RK05/RK05j pack to be part of the drive,
whereas the RK05f pack of is considered to be part of its drive.
4 Apr
4 Apr
12:27 p.m.
Can RK05's from a PDP11 system be used on a PDP8?
Do i need to find
special disk cartridges?
You need a special disk cartridge. Attached to the bottom of the disk
is a short metal cylinder with slots in it. These slots define the sectors
on the disk. PDP-8 cartridges use 16-sector disks while PDP-11
cartridges use (IIRC) 12-sector disks.
--
Roger Ivie
TeraGlobal Communications Corporation
1750 North Research Park Way
North Logan, UT 84341
Phone: (435)787-0555
Fax: (435)787-0516
2:09 p.m.
On Tue, Apr 04, 2000 at 03:11:32PM -0500, Lawrence LeMay wrote:
A RP03 i'm told is a multi-platter drive for a
PDP11. Does anyone know
anything else about it? How much storage are we talking about, compared to
an RK05?
It's a 12-platter drive, physically huge IIRC (it's been a while), but only
holds 40 MB. RT-11 makes one RP03 look basically like two RP02s, since it
exceeds RT's 32 MB limit (and this was before the MSCP partition kludge).
The controller is an RP11C or RP11E (not sure what the difference is).
DEC originally used RP03s on PDP-10s, I'm not sure whether the low-level
format is the same on both, but as far as PDP-11 software is concerned
it looks like a true blue 512 b/s device, 10 sectors per track, 20 heads,
and 406 cyls of which 400 are normally used (the extras are for the maindecs).
For comparison, an RK05 holds 2.5 MB.
John Wilson
D Bit
8855
days inactive
8856
days old
8 comments
4 participants
participants (4)
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ard＠p850ug1.demon.co.uk -
lemay＠cs.umn.edu -
rivie＠teraglobal.com -
wilson＠dbit.dbit.com