SATA II vs. SATA 150 - Page 2 - Techist - Tech Forum

Go Back   Techist - Tech Forum > Computer Hardware > New Systems | Building and Buying
Closed Thread
Thread Tools Display Modes
Old 11-13-2005, 10:56 PM   #11 (permalink)
Not A Super Techie
straightv6's Avatar
Join Date: Dec 2003
Posts: 496

Originally posted by Nubius
sounds fancy and will get you to purchase it because it's 'newer' which means 'better' to most

they aren't lying...because it IS transferring 300mb/sec over the cable, doesn't mean your hard drive can actually write that much though
how fast does a hard drive write?

1 fast and 1 slow
straightv6 is offline  
Old 11-13-2005, 11:31 PM   #12 (permalink)
Build Guru
PP Mguire's Avatar
Join Date: Dec 2004
Location: DFW Texas
Posts: 26,030

I always thought that it was the rate at which it transfers through the motherboard.

"Resolution is just a number." #Ubisoft Origin/Steam = PP_Mguire Twitch = pp_mguire Instagram = ppmguire Mechwarrior Online = Thunderson PSN = PP_Mguire

Need Descent and Mechwarrior buddies!
If I helped you, give a thanks! ↓
Access to my Plex PM me.
PP Mguire is offline  
Old 11-14-2005, 06:04 AM   #13 (permalink)
Ultra Techie
Phanto's Avatar
Join Date: Sep 2005
Location: Puerto Rico
Posts: 603

Originally posted by gaara
You won't notice ANY difference between SATAI and SATAII guys, hard drives just simply don't spin fast enough to take advantage of the 150mb/sec bandwidth

To put it into perspective, you have two 7200RPM drives. One uses SATAI and the other uses SATAII. Despite SATAII appearing faster, boht drives are still spinning the same therefore the data on both is still accessed in the same time frame and therefore the bandwidth is identical. Basically what I'm saying is hard drive bandwidth isn't the bottleneck when determining how fast your drive reads/writes, it depends on rotation speed and cache size

Even using a RAID 0 array with two 10000RPM drives you won't notice a difference between SATAI and II
Just wondering is there are not any improvement or difference between SATAI & SATAII why they sell that??

To take advantage of that "speed", what you must posses or buy to get that improvement, that if they exist..?!?
i5 2500k @ 4.5GHz
COOLER MASTER Hyper 212 Plus
MSI Z77A-G45
16GB Corsair Vengeance LP DDR3 1600MHz
Corsair HX650w
eVGA 670 GTX 2GB
Samsung 840 Pro SSD 256GB
Seagate Barracuda 7200.14 3TB
ASUS VG248QE Black 24" 144Hz, Samsung 24" S24B300, Samsung 22" 226BW & HP L1908W 19" (Quad Monitor Setup)
Phanto is offline  
Old 11-14-2005, 07:41 AM   #14 (permalink)
Elbatrop1's Avatar
Join Date: Mar 2004
Posts: 4,057

I'll throw in my 2 cents into the mix too.

I agree with gaara that SATA II wont give you a noticable performance increase over SATA 150. And, as he put it, the bottleneck is the drive itself, not it's interface.

In fact, the average sustained transfer rate of a 7200 rpm HD is about 55-60 MBps (Megabytes per second). Keep in mind that SATA 150 can transfer up to 150MBps. THere is a huge difference already. Mind you, there is something called burst rate, which more involves the cache of the hard drive, which can transfer a small amount of data very quickly.

Now, if you consider a SATA II HD which has a maximum transfer rate of 300MBps, you might ask what the average sustained transfer rate of a SATA II drive is. Well, it is exactly the same, around 55-60 MBps.

Even with a 10000rpm hard drive, all you really need is SATA 150 to keep up with the data transfer rate, although I'm not sure what the avg sustained transfer rate on a 10k drive is...

In short, SATA II is meant for people that are bedazzled by big numbers that dont mean much for real-world performance.

Intel E6750...........PSN: ELBATROP
XFX nForce 650i Ultra
Patriot PC2-6400 8GB (4x2GB)
eVGA 9800GT
36GB WD Raptor
120GB SG
Logitech X-530
Samsung SyncMaster 931c
Samsung SyncMaster 750s
Windows 7 Home Premium 64
Elbatrop1 is offline  
Old 11-14-2005, 08:51 AM   #15 (permalink)
Junior Techie
Join Date: Oct 2005
Posts: 54

sata II, besides having theoretical faster speeds, also makes use of NCQ. This is native command queuing, which you can read up on somewhere else. It basically reorders commands given to the drive, so that drive locations are accessed sequentially rather than haphazardly, hence increasing efficiency. In reality, you will see only see subtle improvements, and more on server, or programs that need read/write access to large amounts of files across a drive.

For now, with drive mechanics and drive density pretty much unchanging, there will be no improvement unless you have multiple raid-0 arrays, wherein the extra bandwidth is enabled. But, if drive densities were to increase vastly, leading to faster transfer times, then that 300mb/s pipeline will be needed.

to be quite honest, i can't see it happening enough to come near reaching 300mb/s, but anyway, they will sell enough new mobo's and hdd for the gullible. When they have newer storage technologies (i think there is one that is perpindicular storage) then they probably will come out with a new interface for it, rendering sata2 obsolete.

edit: if you still want to make use of ncq, you can, seagate puts out a range of sata1 drives that have ncq. I have a 160GB model, but you will need a chipset that supports it, such as the nforce4. Note, that i don't have a mobo that supports it so i can't give you real world results.

AthlonXp 2100+
ECS L7VTA mobo
Enermax EG425P-VE
2 x 512MB DDR400 Geil Value Ram (w/blue hs)
NVidia GeForce4 MX 420
Seagate Barracuda 120GB, 7200Rpm, 8MB buffer (pata),
Seagate Barracuda 160GB, 7200Rpm, 8MB buffer (sata-ncq)
BTC1108IM dvd writer (8X)
Aopen 1648 dvd-rom
sunbeam fanbus controller
Philips 190X5 19\'\' LCD monitor 12ms
alsyed is offline  
Closed Thread

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are Off

Our Communities

Our communities encompass many different hobbies and interests, but each one is built on friendly, intelligent membership.

» More about our Communities

Automotive Communities

Our Automotive communities encompass many different makes and models. From U.S. domestics to European Saloons.

» More about our Automotive Communities

Marine Communities

Our Marine websites focus on Cruising and Sailing Vessels, including forums and the largest cruising Wiki project on the web today.

» More about our Marine Communities

Copyright 2002-2015 Social Knowledge, LLC All Rights Reserved.

All times are GMT -5. The time now is 06:51 PM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2016, vBulletin Solutions, Inc.