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#1
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Smart Array 642 + HP DL380
Okai here is the problem.
Ive plugged in the controller, and then connected a MSA30 Bay, then i added 12 x 18GB 10K Compaq HDD's and made a RAID10 array. Problem is i only get 10MB/s in write, that i would say is pretty poor. All drivers are up to date and raid controller has been ROM updated too, anyone ever heard about this? Read is btw 70-100MB/s so i guess that is decent. Any suggestions is welcome -Mikael |
#2
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Smart Array 642 + HP DL380
"Mikael Antonsen" wrote in message . .. Okai here is the problem. Ive plugged in the controller, and then connected a MSA30 Bay, then i added 12 x 18GB 10K Compaq HDD's and made a RAID10 array. Problem is i only get 10MB/s in write, that i would say is pretty poor. All drivers are up to date and raid controller has been ROM updated too, anyone ever heard about this? Read is btw 70-100MB/s so i guess that is decent. Any suggestions is welcome -Mikael Have you got a Write Cache enabler on your SA642? http://h30094.www3.hp.com/product.as...0Write%20Cache |
#3
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Smart Array 642 + HP DL380
Jez T skrev:
"Mikael Antonsen" wrote in message . .. Okai here is the problem. Ive plugged in the controller, and then connected a MSA30 Bay, then i added 12 x 18GB 10K Compaq HDD's and made a RAID10 array. Problem is i only get 10MB/s in write, that i would say is pretty poor. All drivers are up to date and raid controller has been ROM updated too, anyone ever heard about this? Read is btw 70-100MB/s so i guess that is decent. Any suggestions is welcome -Mikael Have you got a Write Cache enabler on your SA642? http://h30094.www3.hp.com/product.as...0Write%20Cache No i dont got that module, but then again i dont think ppl who bought that controller would see the 10MB/s in write and think.. "well thats okai" would you? |
#4
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Smart Array 642 + HP DL380
"Mikael Antonsen" wrote in message . .. Jez T skrev: "Mikael Antonsen" wrote in message . .. Okai here is the problem. Ive plugged in the controller, and then connected a MSA30 Bay, then i added 12 x 18GB 10K Compaq HDD's and made a RAID10 array. Problem is i only get 10MB/s in write, that i would say is pretty poor. All drivers are up to date and raid controller has been ROM updated too, anyone ever heard about this? Read is btw 70-100MB/s so i guess that is decent. Any suggestions is welcome -Mikael Have you got a Write Cache enabler on your SA642? http://h30094.www3.hp.com/product.as...0Write%20Cache No i dont got that module, but then again i dont think ppl who bought that controller would see the 10MB/s in write and think.. "well thats okai" would you? how is your array controllers caching policy configured? 100% read? I think it has 64M on board, and 64M or 128M cache. Max config has 192M BBWC, but I think the battery on the cache is an option, not standard. You might be able to improve the performance my migrating the stripe size of the logical volumes, and also in your formatting of your logical disks to use larger cluster sizes. - LC |
#5
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Smart Array 642 + HP DL380
NuTCrAcKeR skrev:
"Mikael Antonsen" wrote in message . .. Jez T skrev: "Mikael Antonsen" wrote in message . .. Okai here is the problem. Ive plugged in the controller, and then connected a MSA30 Bay, then i added 12 x 18GB 10K Compaq HDD's and made a RAID10 array. Problem is i only get 10MB/s in write, that i would say is pretty poor. All drivers are up to date and raid controller has been ROM updated too, anyone ever heard about this? Read is btw 70-100MB/s so i guess that is decent. Any suggestions is welcome -Mikael Have you got a Write Cache enabler on your SA642? http://h30094.www3.hp.com/product.as...0Write%20Cache No i dont got that module, but then again i dont think ppl who bought that controller would see the 10MB/s in write and think.. "well thats okai" would you? how is your array controllers caching policy configured? 100% read? I think it has 64M on board, and 64M or 128M cache. Max config has 192M BBWC, but I think the battery on the cache is an option, not standard. You might be able to improve the performance my migrating the stripe size of the logical volumes, and also in your formatting of your logical disks to use larger cluster sizes. - LC Well anyways cant be right that even if not all that is done, the write speed is 10MB/s, that is just DAMN slow, and even 12 HDD's? I tried with the same bay on a Smart Array 5300 controller, and then i got like 50-70MB/s in write, that is "okai", but still not what i would call good, but its 100MB/s read. Do you think that a Battery module would help THAT much? -Mikael |
#6
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Smart Array 642 + HP DL380
"Mikael Antonsen" wrote in message . .. NuTCrAcKeR skrev: "Mikael Antonsen" wrote in message . .. Jez T skrev: "Mikael Antonsen" wrote in message . .. Okai here is the problem. Ive plugged in the controller, and then connected a MSA30 Bay, then i added 12 x 18GB 10K Compaq HDD's and made a RAID10 array. Problem is i only get 10MB/s in write, that i would say is pretty poor. All drivers are up to date and raid controller has been ROM updated too, anyone ever heard about this? Read is btw 70-100MB/s so i guess that is decent. Any suggestions is welcome -Mikael Have you got a Write Cache enabler on your SA642? http://h30094.www3.hp.com/product.as...0Write%20Cache No i dont got that module, but then again i dont think ppl who bought that controller would see the 10MB/s in write and think.. "well thats okai" would you? how is your array controllers caching policy configured? 100% read? I think it has 64M on board, and 64M or 128M cache. Max config has 192M BBWC, but I think the battery on the cache is an option, not standard. You might be able to improve the performance my migrating the stripe size of the logical volumes, and also in your formatting of your logical disks to use larger cluster sizes. - LC Well anyways cant be right that even if not all that is done, the write speed is 10MB/s, that is just DAMN slow, and even 12 HDD's? I tried with the same bay on a Smart Array 5300 controller, and then i got like 50-70MB/s in write, that is "okai", but still not what i would call good, but its 100MB/s read. Do you think that a Battery module would help THAT much? -Mikael Its possible. I havent worked with 1+0 that much so I dont have much in the way of personal experience to measure that against. But yes, the "acceleration" features of the card can make a substancial difference, which of course, you need the BBWC module to fully utililize. - LC |
#7
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Smart Array 642 + HP DL380
Well anyways cant be right that even if not all that is done, the write speed is 10MB/s, that is just DAMN slow, and even 12 HDD's? I tried with the same bay on a Smart Array 5300 controller, and then i got like 50-70MB/s in write, that is "okai", SA5300 has a write cache. but still not what i would call good, but its 100MB/s read. Do you think that a Battery module would help THAT much? Oh yes!!! |
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