Re: USB, 1394, PCI, ISA, IDE ??

[Dave Schecter <dschecter-at-theriver.com>]

>
>Dave Schecter wrote:
>
>> So here we are looking for a cheap easy way to get on the Bus.
>> How about IDE ?  Or SCSI ?
>
>A small burp on the IDE bus will trsh your disk, if the machine
>has an IDE disk.  I know, the hard way!  I have an IDE flash-card
>adaptor.  This has a little green led, and an ejector button.  I had
>no idea you were never supposed to eject a flash card while the
>machine was powered on.  The flash card reader was even connected
>to the OTHER IDE port from the disk drive.  It made a mess all over
>Windows DLL files, and I had quite a time recovering my user files
>and reinstalling Windows over the damaged system.
>
>So, I would strongly advise not to try to put together something like
>this on the IDE.  The SCSI protocol is quite complex, and if you
>had a disk drive on it, it could cause unexpected latency problems
>for the real-time data transfers.  SCSI works best when sending
>large blocks of data back and forth, not small blocks of a couple
>of words, at a very high request rate.
>
>If the USB protocol and drivers can be made real-time compliant,
>that might be a very good solution, as it won't be carrying
>disk or other system transfers.
>
>Jon
> 
I am thinking of this for an EMC dedicated, boot and load EMC from
CD or network box. (no harddisk)
Are there performance or software complexity issues with using IDE ?
I will happily forget SCSI.

Dave