Re: Virtual serial drive

[David Schmidt <schmidtd@my-deja.com>]

On 9/11/2012 3:25 AM, aiiadict@gmail.com wrote:
> On Monday, September 10, 2012 7:04:17 PM UTC-7, schmidtd wrote:
> > http://adtpro.sourceforge.net/vdrive.html
>
> What is transfer rate of 1)serial 2)ethernet ?

I was scared to look.  But...

All times in seconds, measured three times via stopwatch, averaged 
together.  Tests run on a Platinum IIe under ProDOS 1.9 as shipped on 
the VSDRIVE disk.  Host was a 2009 iMac with Prolific USB adapter. 
Virtual and real disks were erased after each write run.  $6C00 bytes 
was the largest single hunk of memory that could be re-read without 
stepping on anything (i.e. the fat Ethernet driver).

Disk II in slot 6
BSAVE A800L6C00,A$800,L$6C00
17.5 (1,609.1 bytes/s)
BLOAD A800L6C00
4.6 (6,121.7 bytes/s)

Super Serial in slot 2
BSAVE A800L6C00,A$800,L$6C00
5.6 (5,028.6 bytes/s)
BLOAD A800L6C00
3.7 (7,610.8 bytes/s)

Uthernet in slot 3
BSAVE A800L6C00,A$800,L$6C00
4.6  (6,121.7 bytes/s)
BLOAD A800L6C00
2.2 (12,800 bytes/s)

CFFA3000 in slot 7 (virtual image on CF card)
BSAVE A800L6C00,A$800,L$6C00
1.7 (16,564.7 bytes/s)
BLOAD A800L6C00
0.5* (56,320 bytes/s)
*Probably beyond my ability to reasonably measure

So, moral of the story - faster than the Disk II, slower than storage on 
the bus, Ethernet is faster than serial.