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LSI 3108 raid controller - how good is it?
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Akkara
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PostPosted: Fri Aug 21, 2015 7:54 am    Post subject: LSI 3108 raid controller - how good is it? Reply with quote

Hi!

I'm considering a machine/motherboard that comes with a LSI 3108 raid controller on it. It'll be running Gentoo (of course :) ). Planning on 8 spindles in a raid-6.

Anyone have any experience with this controller? Any big "gotch-yas" I need to be aware of?

It is advertised as supporting hardware raid 0, 1, 5, 6, 10, 50, and 60. But I've also read the usual advice with Linux is to use kernel raid. Would that advice still apply here? It seems this chip might have a little more "meat" behind it compared to the usual "fake-raid". Is that an accurate assessment? Is it something worth looking into and using? Or stick with kernel raid?

Thanks!
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Roman_Gruber
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PostPosted: Fri Aug 21, 2015 8:01 am    Post subject: Reply with quote

Software raid is hardware independend right? Finding the same hardware with the same firmware will be tricky when the mobo fails...

I am a fan of lvm. And with these days ssd I think raid are not really necessary ...
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Buffoon
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PostPosted: Fri Aug 21, 2015 10:00 am    Post subject: Reply with quote

I think everything said here is still true. I'm using RAIDZ2 myself.
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frostschutz
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PostPosted: Fri Aug 21, 2015 10:06 am    Post subject: Re: LSI 3108 raid controller - how good is it? Reply with quote

Akkara wrote:
Or stick with kernel raid?


I'd stick with mdadm ... if you do use a hardware RAID controller, it might be worth it determining the on-disk format it uses. mdadm supports many formats so it may be possible to emulate the hardware raid controller in software, which takes away the headache of having to find the same hardware again should the controller fail.
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