LSI 9265-8i MegaRAID Card vs Adaptec 6805 RAID Card – The Ultimate 6Gb/s RAID Showdown

SANDISK EFD – IOMETER TESTING: 4K RANDOM READ

Finally we will compare results of testing with the Enterprise Flash Drives. The SanDisk Lightning LS 300S provide us with some great results for sheer IOPS testing. These results will closely match the results that one could expect to receive in a high impact server environment.

There will be some much higher levels of performance with regards to the SSD testing here, with pure IOPS testing in controlled tests to simulate a high load server environment. The differences observed in performance between the two solutions will be amplified a bit, as we are simply pushing much farther in IOPS testing than before.

First we will test the 4k 100% Random Read performance in both RAID 0 and RAID 5. Each test will be conducted with an 8 GB test file; this is to guarantee that all results are not cached. We will conduct the testing with 2 managers, with the corresponding number of QD for each manager. The drives are in a WidePort configuration in a RAID 0, stripe size of 64k for each.

The need for two managers in 4k random read arises as the extreme performance of the solutions will max out the processor if the load is not spread across cores for the generation of I/O. The managers will have their affinity forced to 4 cores each. This will allow for maximum performance. Each test will run for 5 minutes, and the tests will be 4k aligned.

We will show the 9265 RAID 0 and RAID 5 random read results separate from the Adaptec 6805. For reasons that will become clear, it is just not fair to put them on the same chart. The 6805 isn’t even in the same ballpark to be absolutely honest, and after seeing the disparity between these results we tested again. And again, and again. There is just no changing the fact that there is a unbelievable performance difference between the two controllers when under heavy IOPS loading.

When comparing these charts, do note that the LSI results are in hundreds of thousands, opposed to the results of the Adaptec, which are in tens of thousands. The LSI is simply outperforming the Adaptec by absolutely tremendous amounts in all of these 4k random read tests.

The result of the 4k QD 64 for the LSI is 312169, compared to 48550 for the Adaptec. There really is no comparing the two!

Simply amazing that the 9265 can post such tremendous RAID 5 IOPS. The power of the ROC here is very evident as the lead score for the LSI in RAID 5 is 289519 and the Adaptec receives a 30897. That is almost ten times faster in favor of the LSI!

RAID 5 is notoriously slow and horrible to deal with, but the 9265 certainly changes things tremendously on that front.

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Eero Rantala
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Eero Rantala

I unfortunately have the Adaptec 6805 controller and… LOL… where is my garbage can…
I’m running a setup with 4x Kingston 240GB HyperX in R5, the ATTO results arent that shabby… I get 1.5GB/s write and 2.1GB/s read (seq) but…. the short random reads are just terrible… in Winsat it’s only 170 MB/s(!?!).
Funny thing is that when I turn off controller cache I get 9000 MB/s in sequential 64 read… 🙂
I dont however get more than 5ms max response time vs your 55ms value.

Eero Rantala
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Eero Rantala

Winsat with all cache OFF (Swedish W7): > Disk Sequential 64.0 Read 8922.99 MB/s 7.9 > Disk Random 16.0 Read 183.16 MB/s 7.6 > Responsiveness: Average IO Rate 1.01 ms/IO 7.9 > Responsiveness: Grouped IOs 7.94 units 7.5 > Responsiveness: Long IOs 1.98 units 7.9 > Responsiveness: Overall 15.69 units 7.9 > Responsiveness: PenaltyFactor 0.0 > Disk Sequential 64.0 Write 576.71 MB/s 7.9 > Genomsnittlig l„stid med sekventiella skriv†tg„rder0.494 ms 7.9 > Svarstid: 95:e percentilen 0.936 ms 7.9 > Svarstid: maximal 2.820 ms 7.9 > Genomsnittlig l„stid med slumpm„ssiga skrivningar0.542 ms 7.9

Eero Rantala
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Eero Rantala

Winsat all cache ON: > Disk Sequential 64.0 Read 1207.40 MB/s 7.9 > Disk Random 16.0 Read 170.22 MB/s 7.6 > Responsiveness: Average IO Rate 0.26 ms/IO 7.9 > Responsiveness: Grouped IOs 4.58 units 7.9 > Responsiveness: Long IOs 0.45 units 7.9 > Responsiveness: Overall 2.04 units 7.9 > Responsiveness: PenaltyFactor 0.0 > Disk Sequential 64.0 Write 882.76 MB/s 7.9 > Genomsnittlig l„stid med sekventiella skriv†tg„rder0.239 ms 7.9 > Svarstid: 95:e percentilen 1.013 ms 7.9 > Svarstid: maximal 5.359 ms 7.9 > Genomsnittlig l„stid med slumpm„ssiga skrivningar0.326 ms 7.9

Eero Rantala
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Eero Rantala

Next steps to do:
PC –> Adaptec –> Garbage bin
LSI –> PC

Eero Rantala
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Eero Rantala

Hahaaa… my 6805 beats the LSI in the AS SSD copy benchmark 2 of 3:
ISO 880 / 1.22
Program 377 / 3.73
Game 701 / 1.97