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From: borgen@sfd.uit.no (Boerge Noest)
Newsgroups: comp.sys.amiga.hardware
Subject: Re:  GVP Trade-in
Keywords: SCSI, GVP
Message-ID: <1990Aug30.121102.11096@hod.uit.no>
Date: 30 Aug 90 12:11:02 GMT
References: <02048.002057@thiger.UUCP> <552@DIALix.UUCP> <14069@cbmvax.commodore.com>
Sender: news@hod.uit.no (USENET News System)
Reply-To: borgen@stud.cs.uit.no
Organization: University of Tromsoe, Norway
Lines: 18

In article <14069@cbmvax.commodore.com> jesup@cbmvax (Randell Jesup) writes:
>trackdisk and FFS.  I've seen >20K/sec reads.  Note that the theoretical
>maximum is ~24K/sec, not including seek and settle times or any other overhead.

So where does the available bandwith go? I mean, looking in the HW-ref.man
there is three cycles for disk-DMA every scanline (4 for audio), which
makes me believe there is 3*28k = 84k/s theoretical transfer speed(after
MFM that should be 42k/s), but disks spin 5 tracks/s = ~12k*5 = 60k.

Can you get the extra k/s buy using custom loaders and slow-speed saving
your data(to get longer tracks)?

>Randell Jesup, Keeper of AmigaDos, Commodore Engineering.
--
|//// ______________ don't use R/r(eply)! *mail* me ______________	\\\\|
|///  borgen@stud.cs.uit.no   (Borge Nost)   				 \\\|
|//   ...and then there was AMIGA...					  \\|
|/    studying at the worlds northernmost university			   \|