1 Jun
2011
1 Jun
'11
10:23 a.m.
On 2011-06-01 10.00, Ethan Dicks<ethan.dicks at gmail.com> wrote:
On Wed, Jun 1, 2011 at 3:19 AM, Pete Turnbull<pete
at dunnington.plus.com> wrote:
> > On 01/06/2011 03:21, Jerome H. Fine wrote:
>> >>
>> >> For those of you who have heard about a mythical
>> >> SIX ?BUTTON ?FRONT ?PANEL for the BA23,
>> >> it does exist and actually works.
> >
> > Mythical? ?I've probably seen more BA23s with a 6-button panel than
without,
> > and both my BA23s have 6-button panels.
Yeah. Nothing mythical about the 6-button panel. Glad to see that I'm
not the only one thinking so.
I remember_trying_ to put two hard disks in one
machine for quick
disk-to-disk copies. I have a fuzzy memory that it didn't work for
me, but I don't remember whacking either drive to the point that they
didn't work when returned to their former homes.
As far as I know, the BA23 backplane distribution panel can *not* be
used for two disk drives. I know there is a DEC note/article about this
not working. You need the external distribution board for the RQDX3 to
use two drives. If you use the BA23 backplane distribution panel with
two harddisk drives, you have a high chance of corrupting both disks.
(If I remember right, the write gate signal somehow goes to both disks,
no matter what, which cause the disk to possibly start writing when the
disk is seeking, for example. Very bad.)
The BA23 backplane distribution should only be used for one harddisk,
and possibly one floppy.
Johnny