[wplug] New box

[Reany, Burt]

My original understanding of (E)IDE vs. SCSI was that the IDE devices had no
on-board control capability, while SCSI devices DO have on-board logic. When
the single-threaded IDE controller receives a task, it connectes to the
required device, performs the task - waiting for successfol completion of
the task by the device - and then was ready for the next task. SCSI devices
have on-board logic - a new task for a device is given, by the controller,
to the logic on the drive itself for completion. The controller then
detaches from the device,  and is free to handle additional requests for
other devices. By the time that the drive signals back to the controller
that it's task has been completed, the controller may have been able to
invoke several other I/O activities on other devices - multi-tasking. This
extra logic circuitry on each SCSI device - and the implied ability to
reduce elapsed function time, with careful file and table component
placement - is what escalates (and justifies?) the higher cost of these
devices. I personally use SCSI on my home systems - but that's more because
I have access to a stream of SCSI equipment being removed from service than
because interleaved multi-device data access is a requirement.

Whoops; it sounds as tho I'm on my soap-box again.  Excuse me, I'll go back
to my room - -. 

> -----Original Message-----
> From:	H. Lee Brinton [SMTP:6xtippet at icubed.com]
> Sent:	Wednesday, April 25, 2001 9:00 AM
> To:	wplug at wplug.org
> Subject:	Re:   [wplug] New box
> 
> On Wed, Apr 25, 2001 at 06:M:53AM -0400, harrold at sage.che.pitt.edu wrote:
> >i agree with you on the hardrive front, but with cd burners i think the
> >price is worth it. one of my prof's got a 12x ide burner, that cannot
> burn
> >at 12x. he keeps getting buffer underruns. i dont know if he would have
> >the same problem with a scsi drive, but i dont have trouble burning at 8
> >speed while compressing mp3s and messing around on the web.
> 
> No doubt, scsi has a number of advantages. I just can not believe the
> price
> differnce between ide and scsi devices.  I can see paying extra for a scsi
> controller, but the devices should be cheaper than ide, each ide device
> has a
> controler built in.  The only way to get the prices to come down is to
> tell
> the manufacuturers that we will not pay these inflated prices.
> 
> >windows 2000 may be perfect and never crash, but i'm one of those crazy
> >people who thinks microsoft is evil. that is the reason i say: microwave
> >it : )
> You are not crazy, Microsoft IS evil.  But they are an evil company that
> after
> 10 years of massive development has finally produced what appears as a
> stable
> OS, that I am forced to use.
> 
> -- 
> Lee Brinton | 6xtippet at icubed.com
> PGP public key @ http://www.icubed.com/~6xtippet/pgp-public-key.asc
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