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RAID Card Help

post #1 of 6
Thread Starter 
I've been looking at getting a LSI 9240-8i for my test server, but it doesn't have any on-board cache. I was told I didn't need it for a RAID 10 setup, but in all of my reading it looks like it might be better if I go with a PERC 5i/6i. This is for a mechanical drive RAID. Any thoughts from anyone would be appreciated.
Edited by Peanuthead - 5/15/11 at 7:58pm
    
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post #2 of 6
Quote:
Originally Posted by Peanuthead View Post
I've been looking at getting a LSI 9240-8i for my test server, but it doesn't have any on-board cache. I was told I didn't need it for a RAID 1 setup, but in all of my reading it looks like it might be better if I go with a PERC 5i/6i. This is for a mechanical drive RAID. Any thoughts from anyone would be appreciated.
Either option is overkill for RAID-1.

What are you going to be running on your test server?
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ESXi Host 1
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(2x) Intel Xeon E5520 Dell OnBoard Matrox G200 24GB DDR3 12x2GB UDIMMS (18 slots total) 
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PERC6-RAID50 Intel 730 480GB Intel 320 300GB Synology DS414 iSCSI SAN 
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VMWare vSphere5 Enterprise Plus Dell iDRAC6 Remote Management [KVM-Over-IP] Dell iDRAC6 KVM Dell Hot-Swap Redundant 1100W 
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post #3 of 6
Thread Starter 
Sorry, I meant a RAID 10 setup. This is for my ESXi 4 test server. After I'm with it I'll make it into something else.
    
CPUMotherboardGraphicsRAM
Q9550 stock Intel DP35DP 8600 GTS Extreme Overclock 8GB DDR2-800 
Hard Drive
2x Intel X25-V RAID-0 and 1 Seagate 750GB SATA 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
Q9550 stock Intel DP35DP 8600 GTS Extreme Overclock 8GB DDR2-800 
Hard Drive
2x Intel X25-V RAID-0 and 1 Seagate 750GB SATA 
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post #4 of 6
Thread Starter 
Anyone have any input?
    
CPUMotherboardGraphicsRAM
Q9550 stock Intel DP35DP 8600 GTS Extreme Overclock 8GB DDR2-800 
Hard Drive
2x Intel X25-V RAID-0 and 1 Seagate 750GB SATA 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
Q9550 stock Intel DP35DP 8600 GTS Extreme Overclock 8GB DDR2-800 
Hard Drive
2x Intel X25-V RAID-0 and 1 Seagate 750GB SATA 
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post #5 of 6
Raid 1 & 0 aren't as heavily penalized for not having controller write cache as raid 5 can be (like if you're growing an array or rebuilding and have cache off, it can be s.l.o.w. - cache can almost fool you into not noticing it if the system isn't too busy). I have a server with a 9500S and my sig rig has a 9550SX, and the cache is noticeable, but again I'm running raid 5...

As for my opinions on what I have, as I have lots of experience with it - any writes you do that fit in the cache appear to happen crazy fast, especially on a slower cpu (like expanding archives with a Willamette P4 and the 9500S). My personal recommendation would always be toward a high end controller, but they do cost a pretty penny. IIRC, my 9550SX cost $400, and the BBU cost another $100. For that you could get a 250GB SSD...
Edited by u3b3rg33k - 5/17/11 at 4:43am
 
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48GB Crucial Ballistix @1660MHz 9-9-9-27 Momentus XT intel 480GB 520 series INX-720 
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post #6 of 6
Thread Starter 
Thanks. That pretty much aligns up with what I have read. The price between the LSI and PERC 5 is nominal. I'm leaning more towards the PERC controller as it seems to give me more flexibility if I want to use the card for something different down the road.
    
CPUMotherboardGraphicsRAM
Q9550 stock Intel DP35DP 8600 GTS Extreme Overclock 8GB DDR2-800 
Hard Drive
2x Intel X25-V RAID-0 and 1 Seagate 750GB SATA 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
Q9550 stock Intel DP35DP 8600 GTS Extreme Overclock 8GB DDR2-800 
Hard Drive
2x Intel X25-V RAID-0 and 1 Seagate 750GB SATA 
  hide details  
Reply
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