Hello!
I just recently added a WD 250GB disk to my 2x2 G5, and the disk performance is _worse_ than the 160GB Seagate the system shipped with.
Here's the Xbench results:
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Results 106.30
System Info
Xbench Version 1.1.3
System Version 10.3.4 (7H63)
Physical RAM 1792 MB
Model PowerMac7,2
Processor PowerPC 970x2 @ 2.00 GHz
L1 Cache 64K (instruction), 32K (data)
L2 Cache 512K @ 2.00 GHz
Bus Frequency 1 GHz
Video Card ATY,RV350
Drive Type ST3160023AS
Disk Test 106.30
Sequential 108.99
Uncached Write 137.25 57.21 MB/sec [4K blocks]
Uncached Write 120.09 49.18 MB/sec [256K blocks]
Uncached Read 77.40 12.25 MB/sec [4K blocks]
Uncached Read 122.44 49.47 MB/sec [256K blocks]
Random 103.74
Uncached Write 96.90 1.45 MB/sec [4K blocks]
Uncached Write 103.83 23.42 MB/sec [256K blocks]
Uncached Read 100.96 0.67 MB/sec [4K blocks]
Uncached Read 114.90 23.65 MB/sec [256K blocks]
And here's the WD:
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Results 107.58
System Info
Xbench Version 1.1.3
System Version 10.3.4 (7H63)
Physical RAM 1792 MB
Model PowerMac7,2
Processor PowerPC 970x2 @ 2.00 GHz
L1 Cache 64K (instruction), 32K (data)
L2 Cache 512K @ 2.00 GHz
Bus Frequency 1 GHz
Video Card ATY,RV350
Drive Type WDC WD2500JD-00GBB0
Disk Test 107.58
Sequential 102.23
Uncached Write 146.53 61.08 MB/sec [4K blocks]
Uncached Write 128.33 52.55 MB/sec [256K blocks]
Uncached Read 110.23 17.45 MB/sec [4K blocks]
Uncached Read 64.77 26.17 MB/sec [256K blocks]
Random 113.52
Uncached Write 114.00 1.71 MB/sec [4K blocks]
Uncached Write 136.23 30.72 MB/sec [256K blocks]
Uncached Read 97.66 0.64 MB/sec [4K blocks]
Uncached Read 112.54 23.16 MB/sec [256K blocks]
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In the first case, the Seagate does pretty well, about where I'd expect, save for the 4k sequential read, which is about 25% of where it probably should be, for sequential work.
The WD is appreciably faster in writes, altho, not up to where it should be. It should be noted, however, that that disk is about 1/3 full with video captures, so it doesn't get the benefit of using the fastest area of the disk. However, the read speeds for the WD are simply _atrocious_, in fact, they're slower than the Seagate by about half.
I ran these tests about five times for each disk, and these are the _best_ numbers they posted. What, if anything, am I doing wrong?
For comparison, I checked out the Xbench site's database, and even 867MHz G4's post better disk numbers than this. What gives?
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