Date : Sun, 19 Apr 1998 17:58:56 +0100
From : Crispin Boylan <viewtronix@...>
Subject: Re: Drive Tester
Here is a reply to one of my mails to Mark Usher. I would appreciate it if
everyone could type in the program beloe (it is only short) and tell me
the results they get with it? It may be flawed, if it is then please tell me!
I would like to get a good set of results, so help if you can!
Cheers
>Hi
>
>I would send the msg to the list and ask for the opinion there. Don't send
>the attachment though, just include the listing in the program.
>
>Mark
>
>
>>Out of curiosity, I decided to write a program which tests the speed of a
>>drive for writing a file of &1000 length to disk. The program saves the
>>file 20 times, and each time measures how many clock ticks it took. I have
>>attached the program, it is very simple though and it may have a flaw in
>>it, I don't know. The speed my drive achieved was about 60 ticks for
>>saving from a spinning motor, and 148 from stop (this program won't show
>>this if you CHAIN the file, all results will be from spinning, as it has
>>spun to load the program, to get the speed from idle, you LOAD and then RUN
>>it). The last number shown is the average.
>>
>>I would like to get a good program going out of this simple little thing,
>>but if it has some flaw then please tell me. Just out of curiosity, can
>>you tell me what your drive does?
>>
>>Here is the listing if you can't transfer:
>>
>>10DIM B(20)
>>20MODE 7
>>30PRINT "Drive Speed Testing....."
>>40FOR N=1 TO 20
>>50A=TIME
>>60*SAVE TESTFI 2000+1000
>>70B(N)=TIME-A
>>80PRINT B(N)
>>90NEXT N
>>100FOR N=1 TO 20
>>110C=C+B(N)
>>120NEXT N
>>130PRINT C/20
>>
>>I hope this will be a nice extension to your work on disk drives, it would
>>be nice to see if speed does vary at all between drives, of course modern
>>drives should be able to outpace the Beeb by quite a lot, so there is
>>probably an upper limit to how fast they can get!
>
>
>
>
Crispin Boylan - viewtronix@...
SWOS Page - http://easyweb.easynet.co.uk/~viewtronix
BBC Micro Games Archive - http://easyweb.easynet.co.uk/~viewtronix/beeb/
"I am, I am Superman, and I can do anything " - REM