RAID Creation, Test Setup, And Throughput
RAID Creation
Since the two RAID controllers had different capabilities and features, we decided to take different approaches for each.
In the case of the fully-featured MegaRAID 9260-8i, as well as the Adaptec RAID 5805 we used before, we created RAID 0 arrays with eight SSDs on each of the controllers. Then we used Windows Vista’s RAID capabilities to build a software-based RAID 0 array using the two RAID 0 volumes. This way we’d be utilizing eight SSDs on each controller and on each PCI Express 2.0 link.
For the MegaRAID 9210-8i, we found that the easiest (and best-performing) solution was one huge RAID 0 array managed by Windows Vista. So, we went into the Storage Manager and created a software RAID 0 array using all 16 available Intel X25-E flash SSDs.
Test Setup
| System Hardware | |
|---|---|
| Hardware | Details |
| CPU | Intel Core i7-920 (45 nm, 2.66 GHz, 8 MB L2 Cache) |
| Motherboard (Socket 1366) | Supermicro X8SAX Revision: 1.0 Chipset Intel X58 + ICH10R BIOS: 1.0B |
| RAM | 2GB DDR3-1333 Corsair CM3X1024-1333C9DHX |
| System HDD | Seagate NL35 400 GB ST3400832NS 7,200 RPM, SATA/150, 8 MB |
| Controller I | 2 x Adaptec RAID 5805 8 Port SAS Controller 512 MB Cache |
| Controller II | 2 x LSI MegaRAID 9210-8i (aka Intel RS2BL080) 8 Port SAS HBA |
| Controller III | 2 x LSI MegaRAID 9260-8i 8 Port SAS Controller 512 MB Cache |
| Power Supply | OCZ EliteXstream 800W OCZ800EXS-EU |
| Benchmarks | |
| I/O Performance | IOMeter 2006.07.27Fileserver-BenchmarkWebserver-BenchmarkDatabase-BenchmarkWorkstation-BenchmarksStreaming readsStreaming Writes. |
| System Software & Drivers | |
| Driver | Details |
| Operating System | Windows Vista Ultimate SP1 |
| Intel Chipset | 9.1.0.1007 |
| AMD Graphics | Radeon 8.12 |
| Intel Storage Drivers | Matrix Storage Drivers 8.7.0.1007 |
You will find very detailed information on our storage reference test system in the article Tom’s Storage Charts 2009: A New Test Environment.
Throughput
These are really great results. Both LSI controllers take our RAID arrays, using the 16 Intel X25-E flash SSDs, to a whole new level of throughput as they jump over the 3 GB/s level! The 3,005 MB/s average throughput is excellent for a RAID controller, which typically is better at I/O than at high throughput. LSI’s new 6 Gb/s HBA, the 9210-8i, managed to reach more than 14% better throughput, hitting 3,432 MB/s average read throughput across all drives.
The write throughput wasn’t really different than the read results on the LSI MegaRAID 9210-8i, but the 9260-8i RAID card incurred a slight impact. Still, that’s nothing to worry about—this array on those two controllers is probably faster than anything most of you (or us) have ever seen in the storage arena.
