[SunRescue] sun3/50 booting problems

[William Janssen]

Some of the old drives (that I have) have a jumper that keeps
the drive from powering up till commanded.

Bill K7NOM

Robert D. Keys wrote:

> > I have this old sun3/50, and I am trying to boot it off of the big honking
> > old drives I have. I have a sun3 scsi to centronics-50 cable, but not
> > sun-sun3 cables. So I opened the case of the drive/tape unit with a
> > micropolis 1550 ESDI drive and put a internal to centronics-50 cable in
> > there, and have been attempting to use that, both with and without the
> > terminator.
>
> On the old drives, that sort of cabling should work fine.  They are only
> scsi 1.  Make sure the polarity of the cabling is correct.
>
> > The best I can get out of the thing is "Waiting for drive to spin up...",
> > which it never does. I see the drive apparently spinning up (lots of
> > activity on the little red light). It looks like it is at SCSI ID 0 (b
> > sd(0,0,0) seems to get results)
> >
> > I have tried a few different values for this, what should it be? Is there
> > an LUN here? Maybe I am missing something. Does the drive need some jumper
> > to tell it to spin up on poweron? I have been unable to find any dox for
> > the micropolis 1550 online.
> >
> > -That Damned Yankee Bob Keyes
>
> Your drive is probably a 1558, and there is a spec sheet for it,
> on-line but I forget whether it is at the seagate site or where.
> There are setup sheets from sun for the MD21 and the 1558 drive,
> and the MT02 and Wangtek or Archive tape drives.
>
> If you are using the ESDI drives, there must also be an MD21 controller
> below the drive in the middle, under the metal mounting shell.  Also,
> with a tape in there, there should be a MT02 controller on the underside
> of the metal mount shelf.  Both these controller boards need power
> connections.  Sometimes those get loose, or forgotten about.
>
> Check the MD21 controller to make sure it is set to controller 0.
> Sometimes, the boxes were set up to be the second box on the line,
> and the ID would be different from what was normally expected.
> I just happen to have a pair of 1558's in my car and I will check
> the jumpering on them (wait......)  nnnnn   nope, I have 1355's
> in the car.  From memory... the 1558 needs to be addressed as drives
> 0 and 1 and the last drive of the pair terminated.  If you have a
> tape in the case, the drive is id 0 and terminated.  Look on the
> jumper block (may be a switch block, dont remember), and see if
> the first/second/third position is jumpered or closed.  On the
> MD21 controller, it needs to have only one switch set, if memory
> is correct (I have the setup docs at home, but it has been several
> months since I looked at them).  The first drive case on the line should
> have the switch opened, and the second drive case on the line should
> have the switch closed, I think...  With both the tape and the HD in
> the case, the TAPE controller MT02 is the one with the terminator
> (not the MD21) and it also has one switch set, if memory is correct,
> and is the end device on the scsi line.
>
> That is all that comes to mind, from memory.  I can check the docs
> tonight, if noone else has them..... let me know if you stil need
> the info.
>
> That Southern Genteelman Mint Julep a'Sippin'  Bob Keys.
>
> (:+}}...
>
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