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Performance in Intel IOMeter Sequential Read & Write Patterns

We use IOMeter to send a stream of read/write requests to the drive with request queue = 4. Once a minute the size of the data block changes, so we can see the dependence of sequential read and write operations on the size of the data block.


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The Maxtor 5A300J0 is the best at reading small blocks as it reaches its maximum speed on 4KB data chunks already. Seagate shows the power of its 100GB platters on large data blocks as the drives from that company overcame the 60MB/s mark. On the other hand, these drives are the slowest on small data blocks (up to 8KB).

The slowest drive on large blocks is the WD2000JB – we didn’t retest a newer sample of the same model, but took an older sample.

It wouldn’t be convenient to put all the graphs into one diagram, so we split the participants into groups according to the manufacturer. You can view the diagrams by the following links:

Now let's turn to sequential writing:


Click to enlarge

The Maxtor 6Y200P0 is the fastest when writing small data blocks, but the other Maxtors show good results, too. The Seagate ST3200822A is again the best with large data blocks, while the other Seagate (with the SATA interface) is slower (due to a different cache segmentation?), but keeps its second place.

You can view the diagrams by the following links:

 
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