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Revisiting the Caviar WD1000BB and the 'Cuda ATA IV


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Revisiting the Caviar WD1000BB and the 'Cuda ATA IV
  October 8, 2001 Author: Eugene Ra  


Experimental IOMeter Indices

Our File Server, Workstation, and Database IOMeter access patterns play through on all tested drives at queue depths of 1, 4, 16, 64, and 256. To simplify this intimidating benchmark, we introduced the IOMeter indices, a normalized average of results drawn from 16 I/Os, 64 I/Os, and 256 I/Os. Why normalized? Result under a load of 256 I/Os on a given drive are always higher than those drawn under 64 I/Os. Correspondingly, 64 I/O results are always greater than those of 16 I/Os. Normalization simply entails multiplying the lower load scores by a coefficient to bring their weight in line when averaging.

Running some raw trace files through IPEAK's AnalyzeTrace suggests that lower-load results are more relevant to single-user disk performance. As a result, we've normalized and averaged results from 1 I/O, 4 I/O, and 16 I/O loads under an "experimental" index. A full sort of all tested drives may be found here.

 Testbed II IOMeter Normalized Graphs - Experimental IndiciesDetails... 
Windows 2000 Professional, Unpartitioned
File Server Index
Workstation Index
Database Index
IBM Deskstar 60GXP (60.0 GB ATA-100) - 100.19|
|
Western Digital Caviar WD1000BB-SE (100 GB ATA-100) - 98.95|
|
Samsung SpinPoint P20 (40.0 GB ATA-100) - 96.98|
|
Quantum Fireball Plus AS (60.0 GB ATA-100) - 96.53|
|
Western Digital Caviar WD1000BB (100 GB ATA-100) - 95.88|
|
Maxtor DiamondMax Plus 60 (60.0 GB ATA-100) - 94.41|
|
Seagate Barracuda ATA IV (80 GB ATA-100) - 91.66|
|
Seagate Barracuda ATA IV (80 GB ATA-100) w/ AAM On - 85.74|
|
Western Digital Caviar WD1000BB-SE (100 GB ATA-100) - 114.92|
|
Western Digital Caviar WD1000BB (100 GB ATA-100) - 114.45|
|
IBM Deskstar 60GXP (60.0 GB ATA-100) - 113.82|
|
Samsung SpinPoint P20 (40.0 GB ATA-100) - 111.30|
|
Quantum Fireball Plus AS (60.0 GB ATA-100) - 109.56|
|
Maxtor DiamondMax Plus 60 (60.0 GB ATA-100) - 106.75|
|
Seagate Barracuda ATA IV (80 GB ATA-100) - 102.49|
|
Seagate Barracuda ATA IV (80 GB ATA-100) w/ AAM On - 96.36|
|
Western Digital Caviar WD1000BB-SE (100 GB ATA-100) - 103.61|
|
Western Digital Caviar WD1000BB (100 GB ATA-100) - 103.52|
|
Quantum Fireball Plus AS (60.0 GB ATA-100) - 99.22|
|
IBM Deskstar 60GXP (60.0 GB ATA-100) - 98.42|
|
Maxtor DiamondMax Plus 60 (60.0 GB ATA-100) - 97.58|
|
Samsung SpinPoint P20 (40.0 GB ATA-100) - 96.85|
|
Seagate Barracuda ATA IV (80 GB ATA-100) - 95.62|
|
Seagate Barracuda ATA IV (80 GB ATA-100) w/ AAM On - 89.11|
|

An interesting shuffle occurs when sorting today's 7200 RPM ATA drives in these new indices. IBM's Deskstar 60GXP, a drive that manages to wrap up top spots in all our deployed indices, finds itself under assault by the WD1000 series. Differences between the BB-SE and BB here remain consistent with the deployed index: identical performance in Workstation and Database patterns yet a measurable increase in File Server performance.

The Barracuda ATA IV with AAM off exhibits uniform performance improvements under all three new indices. In a notable twist, however, the 'Cuda IV has trouble keeping up with the competition in these experimental averages even with AAM disabled.

 Conclusion...


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