I have 2 Dell pe2950 with a raid5 configuration. They are identical inconfiguration, however if I do a harddisk benchmark with ATTO Disk Benchmark I get very strange results.
Both machines are of type III and have a perc5/i controller with 6 3.5" 2TB harddisks in raid5 configuration with one hotspare. I Tried raid 50 before, but that configuration didn't seem to work at all. Now the dfs3 machine actually randomly doesn't respond when I start the ATTO benchmark.
So I can't post the images since I do not have a 10 credit reputation but it comes down to this:
DFS3: 0.5kb w:9679 r:8596 32kb w:172164 r:257838 64kb w:197287 r:282699 128kb w:212813 r:302921 256kb w:200324 r:389389 DFS4: 0.5kb w:4213 r:91428 32kb w:233510 r:1533739 64kb w:394182 r:1830975 128kb w:401649 r:2011693 256kb w:429531 r:2080374
The numbers for write and read tranfer rates are in MB/sec. The differences are huge. For 128kb block read access the DFS3 has a max throughput of 302921 (this can't be right) but the DFS4 reaches speeds of 2011693 (I'm sure there is a bug in the UI saying MB/sec). But still its 10x as much.
Also, the DFS3 sometimes just stops working then I start these benchmarks.
Anyone encountered a similair problem?