Raptor or SCSI - Which is going to perform the best?

  • Thread starter Thread starter Marc Brown
  • Start date Start date
CJT said:
Ron said:
Ron Reaugh wrote:



Folkert Rienstra wrote:





Marc Brown wrote:



The question isn't as pointless and rhetorical as it may seem. A
friend of mine can't get over the cool factor of his shiny new
Raptor. I, on the other hand, have been investigating SCSI as my
storage platform of choice. In both cases, gaming is the target
application. In researching SCSI options, my primary aim is to
minimize in-game "chug", which is to say the brief (or sometimes
protracted) performance pauses which seem to coincide with drive
access. I have been told that the SCSI controller card takes the
load off the CPU during drive access, with the result being little
to no discernable "chug".


That's potentially true,


Nope.

[snip]

Yep.


Wrong, SCSI HBAs do NOT remove any kind of CPU load that ATA
controllers

suffer from. There's no SCSI advantage there.



So SATA does access reordering?
Click to expand...



The issue was "SCSI controller card takes the load off the CPU during
drive access".
The above quote is false as it relates to any advantage over SATA.
"access reordering" is done onboard a SCSI HD and not the controller and
has nothing to do with the issue at hand.
Click to expand...

Whatever. I doubt the OP cares whether it's done on the controller
card or the disk drive electronics, but perhaps (s)he does.
Click to expand...


Regardless of where it occurs what leads you to believe that it will have
any significant effect in the circumstances described? The game's reading
something, it can't continue until it has whatever it's reading. I can't
see where access reordering is going to make the difference between pausing
and not pausing.

The solution to the problem is enough RAM that the game can cache everything
it needs, but the OP seems to think that more RAM is going to hurt his
performance, which suggests that he's using an outdated operating system.
 
Wrong, SCSI HBAs do NOT remove any kind of CPU load that ATA controllers
suffer from. There's no SCSI advantage there.
Click to expand...

So SATA does access reordering?
Click to expand...


IIRC, the spec allows reordering, but I'm not sure if any controllers
support this functionality yet.
 
DevilsPGD said:
Wrong, SCSI HBAs do NOT remove any kind of CPU load that ATA controllers
suffer from. There's no SCSI advantage there.
Click to expand...

So SATA does access reordering?
Click to expand...


IIRC, the spec allows reordering, but I'm not sure if any controllers
support this functionality yet.
Click to expand...


For the writeback case for HDs ATA/EIDE HDs have been doing reordering for
some time now.
 
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