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Slow transfer rate with WD1002FAEX Drive

post #1 of 3
Thread Starter 
I've bought a new Western Digital Black Drive (WD1002FAEX), Started by connecting it to GSATA3 port and changed the controller from IDE to AHCI. I got it partitioned by EASEUS Partition Master Pro. Bootable DVD, Set it to 2 drives (101GB Primary and active for C :, and the rest of space as logical for D :, Then i started the windows 7 x64 installation, Installed the drivers (Including Intel SATA driver). Everything went good at that point. I use my pc most of the time for music production so while i was copying some sound samples from the drive D: to the drive C: of the same drive i got a very disappointing speed rate, It's started at 90MB/Sec , Then it got lower to 70MB/Sec and then i dropped down to 38 - 40 and stayed like that till the end of the copy, I'm aware that the copy speed can't be fixed and will drop but that was too much.. I tried a different files and still the same. Contacted W.D Support told me to run "Data Lifeguard Diagnostic" and got no errors. At the end they reply with that :

"Dear Customer,

Thank you for your reply.

Unfortunately, since you keep experiencing this issue, we recommend you to have the drive replaced.'

The thing is I'm not living in a country were i can get an online RMA, So i have to go to distributors which will usually run out some tests and say that the hard is ok. Or maybe if i got it replaced the same issue would still be there. so to sum up all this, I just need some answers to those questions:

1- What is the average speed for WD1002FAEX in MB/sec?
2- Is it ok that the hard make a noise when loading? (It's not clicking, It's just a louder noise than i used to hear)
3- When installing a multiple applications sometimes the pc get freeze for like 5 seconds is that normal?
4- Is there anyway to fix that?!!

My Pc Spec:

- Processor: Core i5-2400, 3.10GHz, 6MB Cache.

- Motherboard: GIGABYTE GA-P61A-D3.

- RAM: Kingston (KVR1333D3N9/4G) 4GB-10600 CL9.

- VGA: PNY GEFORCE 9600GT (yeah it's kinda creepy and old).

- Hard Disk: WD Black WD1002FAEX.

- PSU: XFX PRO550W Core Edition.

Tests Screenshots:












Here are some ways i tried to fix it but didn't work:
Updated BIOS to latest ver.
Changed the sata cable.
Connected the hard to a different SATAIII port

I hope that someone would be able to help me fix this since it's dirivin me crazy. Thanks smile.gif.
Edited by M.a.M - 12/16/12 at 4:29pm
post #2 of 3
There's nothing wrong that I can see there - except the 2 UDMA CRC errors, which could indicate a bad or loose cable.

What you have to remember is, when you're copying from a drive to a partition on the same drive, the drive is both reading and writing data. That means you can get at max half the speed you get in benchmarks. 97MB/sec avg read gives you a theoretical file copy speed of under 48MB/sec.

See, when you copy from one Physical Drive to another, it goes like this:
-Drive A seeks to file.
-Drive B seeks to location to write file.
-Drive A reads at full speed.
-Drive B writes at full speed.

So you get very close to what you see in benchmarks. (Often ~100MB/sec or higher.) Then both drives seek to the very next file, which is right beside where each drive's head currently is, and may only take a few miliseconds.

Now, when you copy from one partition (drive letter) to another on the same drive, it goes like this.
-Drive A seeks to file.
-Drive A reads file.
-Drive A seeks to next partition.
-Drive A writes file.
-Drive A seeks to next file...
...
And so on.

So you end up with a lot more seeking back and forth to files. That is both noisy and takes longer. You lose about 8-12ms on every longer seek. If you were copying 2MB MP3s (which take about 20ms to read and 20ms to write @ 97MB/sec, or 97KB/ms) from one physical drive to another, then it would take about 20ms per file. But if you copy from the same drive to the same drive, then the read/write times stack and you have to add two seeks in. That increases the time per file to about 56ms.

20ms is only 35% of than 56ms.
36MB/sec is about 36% of 97MB/sec.

The math lines up. Your single hard drive is performing properly for the workload you're giving it. If you want to increase your file copy speed to close to 100MB/sec, buy a second hard drive and copy files to it.


Regarding freezing for a few seconds - you may be able to mitigate that by enabling all write caching tweaks. See here:
http://www.windowsreference.com/windows-server-2008/enable-disk-write-caching-to-improve-performance-in-windows-7-windows-server-2008/

I've been using that tweak for years without issue. Most modern drives (except WD ones) force it enabled anyway, so you may as well turn it on. That's one more reason WD is liked in workstation/server environments - they let you control things like that...
     
CPUMotherboardGraphicsRAM
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Hitachi 2TB - HDS723020BLA64 Crucial M500 960GB - CT960M500SSD1 WD 4TB Black - WD4001FAEX WD 4TB Black - WD4001FAEX 
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CPUMotherboardGraphicsRAM
FX-8350 @ 4.6ghz 1.425v Sabertooth 990FX Zotac GTX 1070 Amp! 32GB (4x8GB) Kingston Fury 1866mhz CL10 1T 1.5v 
Hard DriveHard DriveHard DriveHard Drive
Hitachi 2TB - HDS723020BLA64 Crucial M500 960GB - CT960M500SSD1 WD 4TB Black - WD4001FAEX WD 4TB Black - WD4001FAEX 
Hard DriveHard DriveHard DriveHard Drive
Seagate 2TB - ST2000DM001 WD 640GB Black - WD6401AALS Seagate 6TB - ST6000DM001 Micron M500 - MTFDDAK480MAV 
Optical DriveOptical DriveOptical DriveOptical Drive
Pioneer DVR-115DBK Samsung SH-S243D/BEBE LG GH22NS90 Lite-On EBAU108 External DVD 
CoolingCoolingCoolingOS
Noctua NH-D15 Fractal Design 140mm Fan - FD-FAN-140 Fractal Design 120mm Fan - FD-FAN-120 Windows 7 
OSMonitorMonitorKeyboard
Ubuntu 14.04 LTS Samsung 2343BWX 23" (2048x1152) BenQ GW2765HT 27" IPS LCD Monitor (2560x1440) Genius Keyboard KB-G235 PA 
PowerCaseMouseMouse Pad
Seasonic Platinum 1000w PSU - SS-1000XP Fractal Design Define R5 Steelseries Rival 6500 dcpi Mousepad + Desk 
AudioAudioOtherOther
Onboard Realtek® ALC 892 Cyber Acoustics CA-2992 2.0 Speakers Razer Krait 1600 DPI nGear G-C1601 Card Reader 
OtherOther
Pisen Card Reader Gigabyte M7 Thor 
CPUMotherboardGraphicsRAM
VIA Eden C7 1200mhz Jetway J7F4K1G2ES-LF VIA Onboard 512MB PC2-4200 
Hard DriveOptical DriveCoolingOS
A-Data FlashDrive None Fanless Linux 
MonitorKeyboardPowerCase
Headless None 65w Power Brick Antec ISK300-65 
MouseAudio
None Onboard VIA 
CPUMotherboardGraphicsRAM
Barton XP-M 2400+ FJQ4C Asus A7N8X-E Deluxe 256MB BFG 7800GS OC 2x512MB Samsung PC3200 
Hard DriveOSMonitorKeyboard
Raptor 74GB/Seagate 120GB Windows 2000 Pro 60hz 17" CRT Brandless PS2 Keyboard 
PowerMouse
Antec Neo HE 550w Logitech G5 
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post #3 of 3
Thread Starter 
I finally got it.! Thanks a lot for ur answers and explanations smile.gif
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