Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!wuarchive!wugate!uunet!mcsun!sunic!tut!oulu!nix
From: nix@tolsun.oulu.fi (Tero Manninen)
Newsgroups: comp.sys.amiga
Subject: Re: Diskperf - problem encountered
Message-ID: <783@tolsun.oulu.fi>
Date: 2 Sep 89 23:27:37 GMT
References: <4293@udccvax1.acs.udel.EDU>
Reply-To: nix@tolsun.UUCP (Tero Manninen)
Organization: University of Oulu, Finland
Lines: 25

In article <4293@udccvax1.acs.udel.EDU> multi@vax1.acs.udel.EDU writes:
->Sys. Conf.:  Amiga 500 with 1 mag ram:
->	     Segate 65 MB HD + SupraDrive SCSI Interface
->	     etc...etc.. (and other standard stuff)
->
->Problem   :  DiskPerf found on FF#222 won't run properly, the earlier
->	     version of the same program did, however.
->	    
->Upon execution, the program will run and give information on the # of 
->read/write scan detected (estimated) followed by an error message that
->says it can not allocated 512 KB of disk memory????  This happened 
->while my drive still had 25+ MB of free space.     

Mmm.. I think your problem is memory shortage.
Diskperf2 needs one 512k long memory block for reading data from disk
into it. Your 1M A500 has two 512k memory areas (0-7ffff and c0000-c7ffff).
Because AmigaOS has already used some memory you never have 512k long
memory blocks available. With 1M Agnus I think you could turn c0000
memory to start at 80000 and there would be one over 512k long block (if
your memory were not too fragmented).

With Diskperf2 sources you can change the maximum buffer size to
shorter (like 256k) and compile new version as I did.

++Tero