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I have a pair of x25-M 160 Intel SSD's in an HP DL360 G5 with a p400i Smart Array running 512 BBWC. The disk performance I am getting on this box and another identical one does not come close to matching the same two drives running through a cheap 3ware RAID card. Any idea?

I have played with the cache settings, but nothing allows me to get the same results. It seems like the Smart Array controller is the bottleneck.

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Forgot to mention the drives are in a RAID 1 in all cases. –  user67304 Jan 18 '11 at 19:41
    
Any details on what performance you're actually getting? Array configuration? Benchmarking method? –  Chris S Jan 18 '11 at 19:46
    
The drives are in a RAID 1 configuration. I use dspspeed.exe - Disk Speed v1.1, which does a good job at measuring random reads, which is my primary concern with these boxes. The 3ware gives me random read of 58 MB/sec, the Smart Array has 41 MB/sec. No doubt this is better than the 5 MB/sec the 10K 146 GB drives provided, but I'd like to get the most out of the SSD's as possible, –  user67304 Jan 18 '11 at 19:54
    
Does the SA Card have the latest firmware? It's possible that card simply disables certain features that enable higher throughput when its used with non-HP drives. HP writes custom firmware (usually) for the drives it sells. –  Chris S Jan 18 '11 at 20:18
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For those wondering, I just tried using an Intel 520 series 240GB SSD with a P400. Works! But does not work with an E200 controller. KR Magnus, Sweden –  user112198 Feb 28 '12 at 8:35

3 Answers 3

You may want to consider using another disk measurement tool. Have The p400 controller and HP SAS disks are very common setups, and if you were only receiving 5MB/s random reads/writes, there may be a larger problem. Can you run your analysis using another disk performance analysis program like Iometer?

For the SSD drives, I'd expect a better random read/write, but it helps to understand exactly what you're testing.

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5 MB/s with a really small block size is what I would expect. Are we comparibg apples with pears here? –  3molo Mar 31 '12 at 10:17

The controller doesn't support those drives, I'm surprised it worked at all, HP controllers are famous for only working with HP drives.

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Before I bought them I contacted HP and they said they would work. Also, it's been over a year. –  user67304 Jan 18 '11 at 19:56
    
Do you think this for SSD in particular or in all drives in general? –  ErnieTheGeek Jan 18 '11 at 19:59
    
If they did say they'd work they were speaking out of turn, they're not supported. –  Chopper3 Jan 18 '11 at 20:09
    
@Chopper3: works != performs well != supported. I've been told that SA Cards work with a wide variety of drives, but may not perform as well as with HP drive and would not be supported. I wouldn't be surprised at all if that's the case here –  Chris S Jan 18 '11 at 20:35
    
Performs well is relative. As I said above it is 720% faster than the expensive HP drives that came in my server. –  user67304 Jan 18 '11 at 20:53

The smartarray P400 controllers only support SATA1 :-( P410 and hight do SATA2. That might be the problem

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@Chopper3 he's talking about the sata revision, not the raid level. –  Patrick Feb 29 '12 at 22:11
    
You're right, totally misread that, thanks. –  Chopper3 Mar 1 '12 at 5:46

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