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LSI 8308ELP

post #1 of 8
Thread Starter 
Currently I have a perc 5 and perc 6 in my home servers. However on my main server I have got to the point where the 2tb limit is now a concern and am looking at possible upgrades.

Someone close to me on ebay has a few 8308elps hanging around, is this an upgrade as such, I know they only support sata 2 drives which is fine but are read/writes going to be slower than my perc 6??
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post #2 of 8
Quote:
Originally Posted by andymiller View Post

Currently I have a perc 5 and perc 6 in my home servers. However on my main server I have got to the point where the 2tb limit is now a concern and am looking at possible upgrades.

Someone close to me on ebay has a few 8308elps hanging around, is this an upgrade as such, I know they only support sata 2 drives which is fine but are read/writes going to be slower than my perc 6??

On a single drive or small array, probably not. But from personal experience, 6 15KRPM SAS 6Gbps HDDs in RAID0 on a SAS 6Gbps controller yielded in around 800MB/s linear read/write. Using the same HDDs on a SAS 3Gpbs controller, capped at around 450~500MB/s, so... to cut it short, when building multiple high performance HDD arrays, yes.


Concerning the Perc6, have you tried looking for a firmware update? I see that it caps 2TB+ HDDs to 2TB... so I understand why you want a different controller. Have you considered something like an LSI MR 9240-8i or 9260-8i?
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post #3 of 8
Thread Starter 
alittle out of my price range once ive acquired bbu and cables.
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post #4 of 8
Thread Starter 
what about a perc h310?? could i reuse my recently new bbu. but what is performance like compared to perc 6?
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post #5 of 8
Quote:
Originally Posted by andymiller View Post

what about a perc h310?? could i reuse my recently new bbu. but what is performance like compared to perc 6?

Spec wise, it is exactly the same as the 9240-8i. (LSISAS2008 controller). Comparing to Perc6 it really depends on what RAID level you're going to be using. In theory, since the H310 doesn't have a RoC (Raid-on-Chip) controller, any RAID level requiring parity should suffer some performance (RAID5 as example) compared to the PERC6, not as much loss, or none at all with a simpler RAID0 or 1.

But, to put it simple, you'll certainly have better performance (and future proof since it's already a 6Gbps controller) over the 8308ELP. thumb.gif
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post #6 of 8
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I currently use 2 raid 5 arrays but plan to swap out to a single raid 6 array once on 3tb drives.
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post #7 of 8
Quote:
Originally Posted by andymiller View Post

I currently use 2 raid 5 arrays but plan to swap out to a single raid 6 array once on 3tb drives.

AFAIK, in order to be able to use more advanced RAID levels such as RAID5 or 6 on those controllers, you will need to have a key (Not sure if the H310 needs or can have such, but on typical low end/mid-range LSI controllers you do). So, unless you drop a few more £ on the RAID key, you'll be stuck with RAID 0, 1, and 10.

You could try selling the PERC6 in order to raise some more funds too.
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紅白 [Kōhaku]
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post #8 of 8
Thread Starter 
I plan on selling the perc 5 and 6 as the reason for the new card and upgraded hard drives is to virtualise 4 servers from 2 boxes into 1 box. so both cards will be sold.
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