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OS drives on own controller vs being on same controller with data raid5 array (performance?)
Can anyone comment on whether there would be any real advantage of
having the OS drives (mirror) attached to say the motherboard controller (SataII), vs being on the same card as say a 3ware 8 port PCI-x or pcie controller card (along with the raid 5 data array). IE: when i send backup data to this raid5 array, will it perform slower if the OS drives are on the same controller? I cant imagine that it would be that aweful. I've seen the raid5 benches with HD Tach coming in around 90-120 MB/s on the raid5 before (cant remember exactly), so would having them over on the motherboard increase these figures? Cheers |
#2
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OS drives on own controller vs being on same controller with data raid5 array (performance?)
"markm75" wrote in message oups.com
Can anyone comment on whether there would be any real advantage of having the OS drives (mirror) attached to say the motherboard controller (SataII), vs being on the same card as say a 3ware 8 port PCI-x or pcie controller card (along with the raid 5 data array). IE: when i send backup data to this raid5 array, will it perform slower if the OS drives are on the same controller? I cant imagine that it would be that aweful. I've seen the raid5 benches with HD Tach coming in around 90-120 MB/s on the raid5 before (cant remember exactly), so would having them over on the motherboard increase these figures? You already know the answer to that. Either that or you didn't understand a hoot about the answers to your earlier PCIe vs PCI-X question. Just another of your troll attempts, MarkM? Cheers |
#3
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OS drives on own controller vs being on same controller with data raid5 array (performance?)
Previously markm75 wrote:
Can anyone comment on whether there would be any real advantage of having the OS drives (mirror) attached to say the motherboard controller (SataII), vs being on the same card as say a 3ware 8 port PCI-x or pcie controller card (along with the raid 5 data array). I don't see any. Unless the hardware is hard to get to and the controller breaks. IE: when i send backup data to this raid5 array, will it perform slower if the OS drives are on the same controller? Depends. I cant imagine that it would be that aweful. I've seen the raid5 benches with HD Tach coming in around 90-120 MB/s on the raid5 before (cant remember exactly), so would having them over on the motherboard increase these figures? The only real way to find out is to try. Arno |
#4
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OS drives on own controller vs being on same controller with data raid5 array (performance?)
"markm75" wrote in message oups.com... Can anyone comment on whether there would be any real advantage of having the OS drives (mirror) attached to say the motherboard controller (SataII), vs being on the same card as say a 3ware 8 port PCI-x or pcie controller card (along with the raid 5 data array). IE: when i send backup data to this raid5 array, will it perform slower if the OS drives are on the same controller? We just make sure the OS is not on the same physical disk and the backup disk system. If this is a backup disk-to-disk system, do you need RAID? We figure the data is on the production server and it's on the tape (we do disk-to-disk-to-tape), so if the backup server has a disk problem we still have the production server and the tape. |
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