Performance in Intel IOMeter
Sequential Read & Write Patterns
IOMeter is sending a stream of read and write requests with a request queue depth of 4. The size of the requested data block is changed each minute, so that we could see the dependence of the drive’s sequential read/write speed on the size of the data block. This test is indicative of the maximum speed the drive can achieve.
The numeric data can be viewed in tables. We will be discussing graphs and diagrams.
Well, the sequential read speeds of all the drives are close to the specified levels. The difference of 10 MBps can be written off for some variations in the measurement method. The manufacturers may have their own way of benchmarking their SSDs. The RAID array of two X25-V drives delivers an impressive 320 MBps which just wouldn’t be possible with any SATA 300 drive. It is clear that the SSDs will have a performance boost when transferred to SATA 600. The array is also faster than the single drive on small data blocks, but Intel SSDs are generally superior in this respect.
We’ve got an interesting picture at writing. The X25-E goes ahead although closely followed by the MLC-based opponents. The difference between the two models from Western Digital is conspicuous, the 256MB one being faster. The graph of the X25-V goes lower due to the reduced number of memory access channels. This series is going to be inferior not only to the other SSDs but also to 2.5-inch HDDs. The RAID0 array improves the situation, producing a nearly twofold performance boost.