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yzrider210
10-11-2003, 10:47 PM
I was reading in this forum a while ago that you could get a few streams of video with a pair of SATA drives. If you're only running two or three streams, would there be any noticable difference between a SCSI system and a SATA system?

prospector
10-12-2003, 03:59 PM
The only thing that I could find was that the EIDE and SATA drives were much slower in thier seek times.

BUT

That has changed now as 1 company (don't remember off hand which) has SATA 150 drives with seek times of 5, which puts it at the same as SCSI 160 (except for price).

yzrider210
10-12-2003, 04:11 PM
so realistically, with a pair of 250 GB SATA drives from whoever makes the 5ms drives and the onboard SATA controllers on the Asus SK8N (http://usa.asus.com/products/mb/socket940/sk8n/overview.htm)
what kind of performance can I expect?

prospector
10-13-2003, 10:03 AM
Don't think you can get the Megs/sec with only 2 drives that's needed.
The seek time only shows how fast a certain piece of info is found.

With EIDE drives, from time this site has been up (counting old threads) the best that I could see anyone getting is 80 Megs/sec from any type of EIDE drive, with the average of 78, which comes out to 18 megs/sec for each drive (don't look at burst speeds of drives, and don't believe perfect labratory conditions for drive rates).
Real world rates seem to be 18 to 20 Megs/sec for everyone that has posted speeds here.
On Sata 150s, the speed seems to have jumped up to 30 (from the few that have posted speeds)
so 2 drives will get you 60
4 will get you 120 (or there abouts)
But most mobos have only 2 Sata plugs so it would entail getting a card to hook more.
I've seen a cards to hook 4, 6, 8, and 12 drives
so 6 would get ya 180 which should run just about anything the VT could do (as this speed is up where the SCSI 160s did before the 320s came out.

But then you are looking at price again as the price of 4 drives is 130 each plus the price of the card (289 I seem to remember)

So thats 875
With SCSI 320s ya get 4 drives but no card (they can be chained on mobo plug) for around 500 more and get a little better Megs/sec rate.

I've tried all kinds of price comparisons in trying to put a compy together, and the best I could do is 2500 for either the P4 3 GHz
and Dual Xeon 2.4s with either SATA or SCSI and the price difference seems to be the drives with SCSI comin in 500 more.
With all other parts being the same (Video card, monitors and such)

yzrider210
10-13-2003, 10:37 PM
So with two SATA drives running a total about 60 megs/sec, isn't that enough to get 2 or 3 streams? I really want to get a toaster system, but don't have the money to buy like 4 drives and a card, but after a while I may upgrade. So would 2 SATA drives work for that?

Dan Hong
10-14-2003, 08:14 AM
I recently built a system with a single P4 processor (3.0 on a 800mhz front side bus board). We put 2 Western Digital Raptor (10k rpm) SATA drives in it. We were consistantly getting 6 to 8 streams (even with slow motion, alpha, chromakey, and 3D rotations). I'm current building a machine with 4 250 gig SATAs, it looks like 4 to 5 layers is not problem. Incidently, if you shop correctly, the 250s can be found under $200.

prospector
10-14-2003, 10:30 AM
Yea..those are the ones...Raptors;)

They are 36Giggers

Anything bigger so far is back up to the 8.5 seek times.

Dan..What are the readings for those 2 when Toaster disk speed is run?
And are you using them on a different bus from the Toaster.

Like they are the 32 or 64 bit buss and the toaster is on the opposite?
Cuz I think (not entirly sure tho) that the Toaster runs on the PCI-X slots?

yzrider210
10-14-2003, 10:57 AM
What brand of 250 can I get for under $200, and where can I get them? I looked at the Western Digital 250's on Pricewatch and they were $222.

Dan Hong
10-16-2003, 09:44 AM
My bad, the 250s are over $200. We are using the Western Digitals. The 2 Raptors were giving me about 85 to 90mbs. The new 4 X 250 system got 144mbs as a virgin drive but settled back down into the 110 to 120 range as we filled the drive up.

Mark Patrick
10-16-2003, 10:31 AM
I have decided to go with the 3ware 8506-8 SATA controller because I want the long Serial cables.

If I put SATA adapters on my current Western Digital 200 gig regular IDE drives, will they perform as well as factory SATA drives (all 7200 rpm)?

prospector
10-16-2003, 06:15 PM
So it looks like the Slow drives are running in the 25 to 30 Megs/Sec rate each and the 10K drives go from 40 to 45 Megs/Sec.

Ok thanks..

Looks like the fast drives (6 of them) for me. Which is still less than the same sized and number of drives for SCSI (even counting the Adapter card).
Should put me in the 200 Megs/Sec range for drive system.

WannaBToasting
11-24-2003, 09:51 AM
Originally posted by Mark Patrick
I have decided to go with the 3ware 8506-8 SATA controller because I want the long Serial cables.

If I put SATA adapters on my current Western Digital 200 gig regular IDE drives, will they perform as well as factory SATA drives (all 7200 rpm)?

______
Special thanks to Danny Oropeza for directing me to this very informative thread.

Mark? Assuming you hadn't received an answer to your above query from anyone (because no one could know the answer unless they tried it) -- did you try it? :D

If not, what did you do, and what was the result? Thanks in advance...

-Peter G
Laurel, MD

poweriu
11-26-2003, 01:02 PM
Western Digital is coming out with a Raptor that looks very intersting. A prototype of their new model (74 GB) had sustained read speeds of almost 70MB/s when previewed by Storagereview.com. Two or more of those raided should be quite speedy, as that read speed is very near to that of other 10k U320 drives. From what I understand availability is still very limited, but that should change in the near future.

Mark, to answer you question, putting SATA Adapters on your parallel drives would actually slightly slow them down (not noticably) because of the signal translation. In fact, most SATA drives out there, except for the Seagate Barracuda 7200.7 series has an equivalent of that adapter built into its PCB. And reviews have shown that 2 drives that differ only in whether they're SATA or PATA the SATA drive is very slightly slower (eg. WD1200JB [PATA] vs. WD1200JD [SATA])