Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!shadooby!eecae!tank!uwvax!astroatc!nicmad!madnix!perry
From: perry@madnix.UUCP (Perry Kivolowitz)
Newsgroups: comp.sys.amiga
Subject: Re: AmigaDos 1.3 (dh0: vs ASDG 8mb board)
Keywords: DH0: ASDG
Message-ID: <584@madnix.UUCP>
Date: 30 Mar 89 01:38:30 GMT
References: <95522@sun.Eng.Sun.COM>
Reply-To: perry@madnix.UUCP (Perry Kivolowitz)
Organization: ASDG Incorporated
Lines: 36

In article <95522@sun.Eng.Sun.COM> drh@sun.Eng.Sun.COM (D. Ryan Hawley) writes:
>I posted a question a few weeks ago regarding problems between
>my 50 MB Fuji disk drive Pacific Periphs. controller and the 
>ASDG 8 MB board (System gurus with board installed, worked o.k.
>under 1.2 AmigaDos, seems to be related to FastFilesystems).
>Did anyone see any replies?  I must have missed them.  If
>you posted a reply, or saved any replies please send them directly
>to me.

After testing the Overdrive controller here at ASDG, we feel that there
is reason to believe that a timing inconsistancy is present in that disk
controller (the details of which we have discussed in previous messages
on this subject). 

The FastFileSystem exacerbates the problem by allowing lengthy transfers
of greater than 512 byte blocks where the OFS always did i/o in 512 byte
clumps. By doing longer transfers, the likelyhood of hitting the timing
gotcha goes up. 

Try setting your MaxTransfer value in your mountlist to successively 
lower and lower numbers until the problem disappears. If it doesn't
go away give the service department of Pacific Peripherals call for
any pointers they might have. Calling us for assistance will earn a
more detailed answer but with the same bottom line (we are unable
to come up with any change or modification to our board which will
unilaterally cure the problem).

(Clearly, you may perceive this note as being biased since the author
is associated with ASDG. Be that as it may, we are ready to provide
the supporting technical data to any interested parties).

-- 
                        Perry Kivolowitz, ASDG Inc.
ARPA: madnix!perry@cs.wisc.edu   {uunet|ncoast}!marque!
UUCP: {harvard|rutgers|ucbvax}!uwvax!astroatc!nicmad!madnix!perry
CIS:  76004,1765 (what was that about ``giggling teenagers''?)