The so-called "RAID testbed" will also be utilized for SCSI host adapter reviews. Seagate Cheetah 18XL's (18 gig versions) were used in conjunction with the adapters to assess performance.
In all 29160 tests, driver version 4.10.4000 was used along with BIOS version 2.57.2; for all DC-390U3W tests, driver version 5.01 was used along with BIOS version 4.0.
In the single-drive tests, the drive being tested was the only device present on the cable (SCSI ID 0). For multi-drive tests, SCSI ID's were used in sequential order (e.g. SCSI ID's 0 and 1 were used for the two-drive tests). All tests were run with the drive(s) on the LVD channel using the LVD cable that came with each card.
The above reference to "multi-drive tests" may be a bit confusing since this isn't a RAID review. Simply testing the single-drive performance of both cards wouldn't yield the whole performance picture. With that in mind, we've run IOMeter on up to 4 drives simultaneously to put each card's performance scalability to the test.
IOMeter's ability to simultaneously run the same test on multiple drives allows for easy assessment of scalability. Since each subtest runs simultaneously on multiple drives, the total number of outstanding IO's is the number of outstanding IO's in the subtest multiplied by the number of drives being tested - this yields up to 1024 outstanding IO's using standard SR IOMeter access patterns and four Cheetah 18XL's.