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HowTo Setup best perfomance on raid 1

 
Khams
Occasional Visitor

HowTo Setup best perfomance on raid 1

Hello,

I got a DL380G5, and i need to setup 3 raid 1 on it. I found somewhere that the P400 got 2 raid bus (slot 1-4 and slot 5-8).

My question is : shall i set the raid 1 on slots 1-2, 3-4 and 4-5 or 1-5, 2-6 and 3-7.

I was about to use the second solution, ie use 2 bus for each raid 1, but i can't find any confirmation.

Thanks
5 REPLIES 5
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juan quesada
Respected Contributor

Re: HowTo Setup best perfomance on raid 1

P400 performance:
*Eight (8) SAS physical links distributed across 2 internal x4 wide port connectors.
*3G SAS (300MB/s bandwidth per physical link)
*x8 3G SAS physical links (compatible with 1.5G SATA)
*256 MB 40-bit wide DDR2-533MHz cache upgradeable to 512 MB 72-bit wide DDR2-533MHz battery-backed cache provides up to 4.2 GB/s maximum bandwidth
*x8 2.5G PCI Express host interface provides 2 GB/s maximum bandwidth
Khams
Occasional Visitor

Re: HowTo Setup best perfomance on raid 1

Thanks for the P400 description.

"2 internal x4 wide port connectors" : what is the best : to put both raid 1 disks on the same internal bus or one disk on each internal bus ?

I think the second solution is the best one, but i'd like confirmation.
juan quesada
Respected Contributor

Re: HowTo Setup best perfomance on raid 1

it has 8 physical links (the cable is just a 4 to 1 connector but it has 4 separate buses), it makes no difference on performance however on fault tolerance is better to have them separate so if one port/cable fails the other one will be up saving downtime
Khams
Occasional Visitor

Re: HowTo Setup best perfomance on raid 1

Thanks !
juan quesada
Respected Contributor

Re: HowTo Setup best perfomance on raid 1

NP