Solved

sata 6.0 running very slow?

Posted on 2010-08-23
7
815 Views
Last Modified: 2016-06-26
I have a brand new build with an MSI MSI 880GMA-E45 with sata 6.0 along with a Western Digital Caviar Black WD1002FAEX 1TB 7200 RPM SATA 6.0Gb/s drive.  WIth the new windows 7 install it only rates the disk speed at 5.9, and sisoftware sanda is only showing transfer speed of around 100mb.  Any idea why I'm not even getting Sata 3.0 speeds?  I installed all of the ATI drivers including the most recent ones from the website.
0
Comment
Question by:rsoxhater
7 Comments
 
LVL 47

Expert Comment

by:dlethe
ID: 33506594
You are getting what you are supposed to be getting.  6Gb/sec refers to the interface speed, not the disk speed.  Equate to a highway.  Speed limit might be 75, but put a bicycle on it, and it isn't magically going to get faster.

The extra speed is a waste of money until you get enough disks to saturate the pipe.  Even with 4 disks, you can't saturate it. To be politically incorrect .. you got taken.
0
 
LVL 6

Expert Comment

by:siht
ID: 33507227
Hi rsoxhater.

There is no such thing as SATA 6.0. The new SATA 3 interface is rated at 6.0 Gb/s, that is it's theoretical maximum which you will never see in real life with a 7200 rpm drive.

The only drives capable of saturating the SATA 3 interface are some of the faster SSDs. If you want to squeeze more perfomance out of your current drive buy 3 more just like it and put them in a RAID 0 (performance) or RAID 1 (performance and disk redindancy at the cost of storage space).

Western Digital are being purposley confusing with their marketing here, they are marketing their drives with the SATA interface speed rather than the SATA Series number.

SATA 1 - 1.5 Gb/s
SATA 2 - 3 Gb/s
SATA 3 - 6Gb/s
0
 
LVL 11

Expert Comment

by:gikkel
ID: 33507242
Yeah man, sorry...your numbers are fairly normal - but still a little on the slow side.  Traditional sata hdd's weren't close to the bandwidth limit at 3g/s...so you should still expect between a 5.9 and 6.2 for your drive.  You'd need an SSD to go higher.  
When you prepared the installation, did you change serial ata from compatibility mode to ahci?  That's typically the most common issue...if you didn't, check your bios settings and let me know.  You can change after the install but need to make a registry edit.  Also make sure you have the latest AMD® SB850 driver installed.
0
New! My Passport Wireless Pro Wi-Fi Mobile Storage

Portable wireless storage to offload, edit, and stream anywhere.

High-capacity, wireless mobile storage designed to accompany professional photographers and videographers in the field to easily offload, edit and stream captured photos and high-definition videos.

 
LVL 6

Expert Comment

by:siht
ID: 33507328
Edit my post above:

or RAID 1 (performance and disk redindancy at the cost of storage space).

should read:

or RAID 10 (performance and disk redindancy at the cost of storage space).
Big difference between raid 1 and 10.
 
0
 
LVL 11

Expert Comment

by:ocanada_techguy
ID: 33508751
@siht  if you use/differentiate Roman numerals and Aramaic numerals there won't be quite as much confusion written, (but not spoken obviously).  

You can see the SATA naming history here http://en.wikipedia.org/wiki/Serial_ATA 

quoting: "(the term SATA III is being eschewed by the SATA-IO to avoid confusion with SATA II 3.0 Gb/s, which was colloquially referred to as "SATA 3G" [bps] or "SATA 300" [MB/s] since 1.5 Gb/s SATA I and 1.5 Gb/s SATA II were referred to as both "SATA 1.5G" [b/s] or "SATA 150" [MB/s]). "
(remember to differentiate also MB vs Mb, Bytes versus small letter b = bits)

So, there is a small difference, some older early mobos might only support SATA I, or if they support SATA II might still only be 1.5 Gb/s

Notice in the article it asserts most physical hard drives go no faster than the 133MB/s of parallel EIDE ATA133 (as of 2009, as of 2010 a very few are a tad faster than that) whereas SSD are way way faster, about the speed of SATA

Exactly as dlethe wrote, it's the limiting speed of the physical drive itself versus the channel bus maximum.  SSD (solid state drive) can go faster, and most especially we're NOT just talking sustained throughput either, we mean latency, responsiveness, "seek" times, way way faster but not measured in Gb/s.  Yes, the idea of the faster interface is so when you have SEVERAL drives (whether raid or just plain several drives) connected you avoid contention and traffic jams.
0
 

Author Comment

by:rsoxhater
ID: 33994524
qikkel - what registry change?
0
 
LVL 11

Accepted Solution

by:
gikkel earned 500 total points
ID: 33995913
Before you edit anything, ensure it's not already enabled...boot the bios.  Go to integrated peripherals.  Select On-Chip ATA Devices, hit enter.  What does it say in RAID Mode?  If it's IDE, AHCI is not enabled. Do NOT change this yet!!!  Hit enter and let me know the options.  If there's only RAID and IDE, you'll have to change this to RAID (and if that's the case I'll have to help you further).  If there's AHCI, cool, easy fix - but still don't change anything.  Boot back into Windows.  If AHCI is an option, do the following:
regedit -> HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services
open msahci -> right-click on Start
Modify from 3 to 0.
Now you can reboot and change bios to AHCI.
If RAID is the only option, let me know before you do anything.  
0

Featured Post

Superior storage. Superior surveillance.

WD Purple drives are built for 24/7, always-on, high-definition security systems. With support for up to 8 hard drives and 32 cameras, WD Purple drives are optimized for surveillance.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Before I left on my recent vacation to float, boat and waterski on a lake in Minnesota for a week, I checked my phone to make sure there was enough room for photos of my obsession: sunsets. There wasn't. Has this ever happened to you?
Previously, we learned about how professional data recovery experts can recover lost data from a damaged or compromised hard drive (https://www.experts-exchange.com/articles/28564/What's-Possible-with-Modern-Data-Recovery.html). Below, you will find…
This video Micro Tutorial explains how to clone a hard drive using a commercial software product for Windows systems called Casper from Future Systems Solutions (FSS). Cloning makes an exact, complete copy of one hard disk drive (HDD) onto another d…
This tutorial will walk an individual through the process of installing the necessary services and then configuring a Windows Server 2012 system as an iSCSI target. To install the necessary roles, go to Server Manager, and select Add Roles and Featu…

911 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

19 Experts available now in Live!

Get 1:1 Help Now