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PERC 5/i RAID Card: Tips and Benchmarks - Page 627

post #6261 of 7150
Nice to know! Of course I'll always have a backup, but if if it saves me the hours of transferring files back over, it'd be awesome. biggrin.gif
post #6262 of 7150
Quote:
Originally Posted by andymiller View Post

reflashed to latest lsi 8888elp firmware from the megaraid management console, worked a treat and performance is as expected.

Andy, do you have your OS running through your Perc 6i? I do, so I wanted to see how you handled changing the driver for the Perc 6 within windows when changing to the LSI firmware to make sure it boots up correctly.
post #6263 of 7150
i dont, i have a raid 0 500gb array for my OS, perc just handles storage arrays.
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post #6264 of 7150
Does anyone else have any advice? I'd like to flash to the LSI firmware and test with HDTune, but my OS is on the same controller (couldn't add a 2nd one even if I wanted to, only 1 PCIe x16 slot). I have an image of the OS, but that doesn't necessarily help with a different firmware on the controller.
post #6265 of 7150
Currently I have 2x 3 disk raid 5 arrays, when transferring data between arrays I get a sustained 180+ mb/second.

is this the limit that 3 disks can provide or is this max the card can provide, would adding another disk to each array make the transfers quicker still??

its a perc 6 btw.


Edited by andymiller - 1/26/13 at 2:54am
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post #6266 of 7150
This is mine sustained transfer between ICH10R 4xSamsung F3 500gb Raid0 and Perc 6/i 6xWD AAKS 320gb Raid0

post #6267 of 7150
Quote:
Originally Posted by andymiller View Post

Currently I have 2x 3 disk raid 5 arrays, when transferring data between arrays I get a sustained 180+ mb/second.

is this the limit that 3 disks can provide or is this max the card can provide, would adding another disk to each array make the transfers quicker still??

its a perc 6 btw.

It's the drives - the 6i can go way faster than that, even accounting for the fact that both transfers are going through the PERC.

 

Do you need 2 separate arrays?  If the disks are similar, then a single 6-drive RAID6 would be superior in every respect to 2 3-drive RAID5 arrays.

post #6268 of 7150
so if I add more drives speed will increase, theoretically you have 4 drives transferring to 6, I have 2 transferring to 2 as 1's the parity drive on each array.

so hopefully when I add another disk to each array it should add on upto another 100mb/second if im lucky.

still 435mb/second is pretty sweet.
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post #6269 of 7150
Quote:
Originally Posted by the_beast View Post

It's the drives - the 6i can go way faster than that, even accounting for the fact that both transfers are going through the PERC.

Do you need 2 separate arrays? If the disks are similar, then a single 6-drive RAID6 would be superior in every respect to 2 3-drive RAID5 arrays.

well I was running 1 array for each of my vm's, 1 a file server and 1 a media server, but im thinking about changing over to esxi as the last time I tried it I couldn't add my array to it without breaking it up, with the new one it detects my arrays fine.
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post #6270 of 7150
Quote:
Originally Posted by andymiller View Post

so if I add more drives speed will increase, theoretically you have 4 drives transferring to 6, I have 2 transferring to 2 as 1's the parity drive on each array.

so hopefully when I add another disk to each array it should add on upto another 100mb/second if im lucky.

still 435mb/second is pretty sweet.

 

Quote:
Originally Posted by andymiller View Post
well I was running 1 array for each of my vm's, 1 a file server and 1 a media server, but im thinking about changing over to esxi as the last time I tried it I couldn't add my array to it without breaking it up, with the new one it detects my arrays fine.

 

assuming you aren't doing disk intensive work (and media & file servers in home environments are very unlikely to be doing so), I would reconfigure to have 1 array - you won't need to keep the drives separate.  Remember that if you're using a single array you won't ever need to transfer from 1 to the other :)

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