🚀 go-pugleaf

In article <1991Apr11.114144.79@ulkyvx.bitnet>, kpjone01@ulkyvx.bitnet writes:
>Is there any way to hook a standard rll or mfm hard drive up to a Q-bus 
>machine?
> 
>Kevin
>kpjone01@ulkyvx.bitnet

Well, the DEC RQDX3 uses MFM & ST506 connections, but the drive types
for 2 drives (RD53 and RD54, dunno about RD52) are hardcoded in ROM
on the board.  These are really just off-she-shelf ST506 hard disks
from QUANTUM and MAXTOR (well, DEC tweaked the motor power control on
one I beleive to let it ramp up to speed more slowly to ease the power
supply).

One thing you do have to realize though is that MFM/RLL( and thus
I presume you mean ST506 drives) are going to be ALOT SLOWER than
more recent technologies (ESDI, SCSI) or well-established high
performance interfaces (SMD, IPI).  The ST506 interface can only
go so fast, the best I have seen it do is 500KB/sec which is miserable
for a multiuser system.  If you can ESDI or SCSI drives, by far all
the better.
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Michael F. Santangelo                 + Inet: mike@uc780.umd.edu
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Academic Computing UMUC               + Bnet: MIKE@UC780
(The University of Maryland,          +       MIKE@UMUC (not visited often)
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