WD 640 black results so low?

[upcoast604]

Western Digital Caviar Black 1TB Hard Drive Review

In the cystaldiskmark test the wd 640 black I have takes a bit of a dive on the write MB/s compared to the results in the review, what could be going on that I'd need to change? Thanks

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CrystalDiskMark 3.0 x64 Beta2 (C) 2007-2009 hiyohiyo
Crystal Dew World : Crystal Dew World
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Sequential Read : 120.692 MB/s
Sequential Write : 116.560 MB/s
Random Read 512KB : 51.108 MB/s
Random Write 512KB : 73.305 MB/s
Random Read 4KB (QD=1) : 0.718 MB/s [ 175.4 IOPS]
Random Write 4KB (QD=1) : 1.606 MB/s [ 392.0 IOPS]
Random Read 4KB (QD=32) : 0.766 MB/s [ 187.1 IOPS]
Random Write 4KB (QD=32) : 1.682 MB/s [ 410.5 IOPS]
Test : 1000 MB [Q: Used 0.1% (0.1/93.3 GB)]
Date : 2010/01/05 8:00:38
OS : Windows 7 Ultimate Edition [6.1 Build 7100] (x64)

I also have a wd 1TB black on order that I don't know wether to use it for OS or use the wd 640 black for OS? I'll be making a 100GB
partition for the OS.

[bojangles]

You may have bought the AAKS version of the drive, rather than the AALS version. That may be why. Sequential write speeds are great though.

[upcoast604]

1TB seems somewhat slow compared to the 640 AALS
Brand new 1TB WD drive formatted nothing stored on it yet, maybe game drive.

HD Tune: WDC WD1001FALS-00E8B0 Benchmark
Transfer Rate Minimum : 54.4 MB/sec
Transfer Rate Maximum : 108.6 MB/sec
Transfer Rate Average : 89.6 MB/sec
Access Time : 12.3 ms
Burst Rate : 134.5 MB/sec
CPU Usage : -1.0%

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640GB drive

HD Tune: WDC WD6401AALS-00L3B2 Benchmark
Transfer Rate Minimum : 59.2 MB/sec
Transfer Rate Maximum : 118.0 MB/sec
Transfer Rate Average : 95.3 MB/sec
Access Time : 11.9 ms
Burst Rate : 137.1 MB/sec
CPU Usage : -1.0%

I think I should run the OS on the 640GB aals and use the 1TB for games, yes/no?

Old 250GB does OK .
HD Tune: ST3250410AS Benchmark
Transfer Rate Minimum : 52.3 MB/sec
Transfer Rate Maximum : 95.0 MB/sec
Transfer Rate Average : 82.0 MB/sec
Access Time : 15.2 ms
Burst Rate : 164.8 MB/sec
CPU Usage : -1.0%

[Oversized Rooster]

The 640GB Caviar Black is the fastest of the bunch - especially by access times. The 1TB version is a little slower. Here are some results from my machine:

WD6401AALS HD Tune


WD1001FALS HD Tune


WD6401AALS ATTO


WD1001FALS ATTO

[DrPepper]

I thought the Seagate Barracuda 7200.12 1tb was faster cause of the 2 platters...

[Oversized Rooster]

Originally Posted by DrPepper

I thought the Seagate Barracuda 7200.12 1tb was faster cause of the 2 platters...

Only in transfer speeds but not in access times unfortunately which is what really matters.