23 Nov
2003
23 Nov
'03
10:18 p.m.
On Monday, November 24, 2003, at 04:46 AM, Fred N. van Kempen wrote:
Good point... Right now I'm using a Lear Siegler
ADM3A :)
Yeah, that would
be great. Is there anything special I have to do when
I write the tape to make sure the PDP-11 can read it? Since the tape
drives are different (the PDP-11 one is Pertec, the Prime one is SCSI),
will the tapes be compatible? It sounds like tapes written with two
slightly different Pertec controllers on the PDP-11 aren't compatible.
Ian Primus
ian_primus(a)yahoo.com
Since the "*** THIS VOLUME" ... comes from the boot loader (it is not
in the bootstrap program...) on tape, we *did* load something from it.
OK, that's good, I was worried that the tape drive might be damaged, or
have dirty heads or something.
Dunno which tape you are using, but: the address the
boot loader uses
is that of the TM11/TS11. The instruction (100001) it sends to the
controller doesn't match that of the TM11, so it must be the TS11 it
thinks it has- and this is quite often the case with Emulex and Dilog
controllers.
I tried three different tapes, two of which are the same thing. One
tape is a homemade system tape, on an ten inch reel. The label is
handwritten in pencil and hard to read. It says "RSX-11-M-Plus V4.0
Operating system for Eagle (DB2, omitting software directories) VMR'd
for extra pool space <something I can't read>, needs DTR files
[1,2],<something else I can't read>" The other tape is an official
Digital tape on a 12 inch reel. The label says "BB-JO81J-BC
RSX-11M-LUS V4.4 BRU MT:1/1 ID:RSX11MPBL78 DIST 1600BPI COPYRIGHT
1993 DIGITAL EQUIPMENT CORPORATION MB0804". I don't know what
controller these were written for, or how my Emulex card is set up.
I'll have to read through the Emulex manual some more.
Even though we were able to load the secondary
bootstrap off tape
(which
is blocks 0 and/or 1 on tape), we **ALSO** need to have that code know
what we're loading from.
Are these leading blocks written in the same format or
a different
format as the rest of the tape? What about density? I'll have to look
up in the manual, but I _think_ the default on my drive is 1600bpi, but
I'm not positive.
Suppose... we load the secondary boot. But: that
thinks we're using a
TM11 controller. It then tries to load the rest off tape... but barfs,
because the TM11 doesnt respond (since it's really a TS11.) ... error..
What's the difference between the two controllers? Is their tape format
different, or just the headers?
I might end up
doing that, I can write down the output, and email it
to
you.
Use a terminal program on a PC or other system, and just log the
sessions. Much easier :) I have two
blank tapes, as well as the SCSI nine track tape drive that
goes with my Prime. I should be able to connect the other tape drive
to
a PC, and dd a tape image to a real tape. Is there a known working,
bootable tape image out there on the 'net that I could use to test?
Sure,
whatcha want? I can send you the Ultrix-11 mini root, which is
very small, and which will tell you whether things work or not..