[Coco] hard disk performance

[Tim Fadden]

???  I am confused.

According to your test,  it took 25 seconds to read 1,024,000 bytes  or, 
one megabyte.  If you devide 1024000 by 25 the result is 40960 closer to 
40kbytes/sec or  327Kbits.  Pleas show me your math to get 12k/sec  12k 
what?  bits bytes blocks. 

I am sure I am missing something here.  Just not sure what.

Your test is exactly what I did and got 30secs for a megaread pass.  to 
me that seems to be 34kbytes/sec. 

It must be that I am confused just how much data megaread is reading!  
is it reading megabytes, or megabits?

Whatever it is reading, its a bunch faster than floppys! ha ha ha

Confused in AZ. 
Tim



Robert Gault wrote:

> Discussing test results is pointless unless the test is specified 

> precisely and all reported test adhere to the same protocol.

>

> So, to propose a specific test, get Megaread from the NitrOS-9 

> distribution and transfer it to your Coco hard drive system. Then 

> execute the command sequence

> load date

> date t; megaread </h#@; date t

> where # is the number of the drive under test.

>

> Results on my Ken-Ton scsi adapter, 6309 modified RGB-DOS driver, and 

> Segate ST-296N hard drive are

> Fri Sep. 26, 2008 07:12:32 PM

> Fri Sep. 26, 2008 07:13:57 PM

> for one pass of megaread. That should be ~12k/sec.

>

> The same test using an Adaptec 4000A board with a Tandon TM-252 gave

> 11.4k/sec.

>

> My modified driver uses the TFM command to transfer data.

>

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