In this review, the harddisks where not partitioned the same. Due to this, the small capacity design of the Raptors looks much faster, while it will never show that advantage when the critical files are positioned properly on the larger HDD.
For instance, when all disks would use a 30 GB partition, users can compare the fast part of each harddisk for speed, while the slow part of bigger harddisks can be used for storage.
Even if a user would use only the fast part, the bigger harddisk will still be cheaper and may be just as fast when you use the same capacity of it, because the inner tracks, which are slower, can then be left unused.
This is possible because the outer track of a 7200RPM/3.5" drive spins just as fast over the head as the outer track of a 10000RPM/2.5" drive. (Just try 2.5*10*3.14=3.5*7.2*3.14, it will not be exactly equal, but close enough to make my point)
Spin latency will still be higher for the large disk, but command queing and cache usage may reduce the meaning of this disadvantage.
The tranfer rate test allready shows that the fast part of the large drive is very close to the Raptor.
Besides, there are more differces between the Raptor 74 and the 36 than the size, making the comparision between the 74 with TCQ and the 36 without meaningless for measuring the TCQ impact. Just try one test with the 74 without TCQ to find out that it does not perform the same as a 36.
For instance, when all disks would use a 30 GB partition, users can compare the fast part of each harddisk for speed, while the slow part of bigger harddisks can be used for storage.
Even if a user would use only the fast part, the bigger harddisk will still be cheaper and may be just as fast when you use the same capacity of it, because the inner tracks, which are slower, can then be left unused.
This is possible because the outer track of a 7200RPM/3.5" drive spins just as fast over the head as the outer track of a 10000RPM/2.5" drive. (Just try 2.5*10*3.14=3.5*7.2*3.14, it will not be exactly equal, but close enough to make my point)
Spin latency will still be higher for the large disk, but command queing and cache usage may reduce the meaning of this disadvantage.
The tranfer rate test allready shows that the fast part of the large drive is very close to the Raptor.
Besides, there are more differces between the Raptor 74 and the 36 than the size, making the comparision between the 74 with TCQ and the 36 without meaningless for measuring the TCQ impact. Just try one test with the 74 without TCQ to find out that it does not perform the same as a 36.
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