Comments on: bcraid drivers part two http://blog.affien.com/archives/2006/08/05/bcraid-drivers-part-two/ A few thoughts Wed, 19 Nov 2008 22:23:13 +0000 http://wordpress.org/?v=2.6 By: Bas Westerbaan http://blog.affien.com/archives/2006/08/05/bcraid-drivers-part-two/#comment-87776 Bas Westerbaan Thu, 05 Oct 2006 18:55:35 +0000 http://blog.w-nz.com/archives/2006/08/05/bcraid-drivers-part-two/#comment-87776 Hi, Strange that you get that kind of compile errors on Gentoo. Software hardware raid (it's a microcontroller with software on the raid card) isn't a lot faster than software on your cpu. With linux the difference is probably neglectable because the linux drivers aren't that good. Real hardware raid, on the other hand, is worth it. But those cards cost a fortune. Hi,

Strange that you get that kind of compile errors on Gentoo.

Software hardware raid (it’s a microcontroller with software on the raid card) isn’t a lot faster than software on your cpu. With linux the difference is probably neglectable because the linux drivers aren’t that good.

Real hardware raid, on the other hand, is worth it. But those cards cost a fortune.

]]> By: Brian http://blog.affien.com/archives/2006/08/05/bcraid-drivers-part-two/#comment-87774 Brian Thu, 05 Oct 2006 18:45:39 +0000 http://blog.w-nz.com/archives/2006/08/05/bcraid-drivers-part-two/#comment-87774 Hey Bas - Thanks. I actually gave up. I believe it's possible (I'm running gentoo), but I don't have a few days to waste doing it. I just switched to software RAID. Is the controller much faster than linux software RAID? I doubt I'd switch at this point, but if the speed was more than 30 or 40% faster, I'd consider it. Hey Bas -

Thanks. I actually gave up. I believe it’s possible (I’m running gentoo), but I don’t have a few days to waste doing it. I just switched to software RAID. Is the controller much faster than linux software RAID? I doubt I’d switch at this point, but if the speed was more than 30 or 40% faster, I’d consider it.

]]> By: Bas Westerbaan http://blog.affien.com/archives/2006/08/05/bcraid-drivers-part-two/#comment-87770 Bas Westerbaan Thu, 05 Oct 2006 17:54:52 +0000 http://blog.w-nz.com/archives/2006/08/05/bcraid-drivers-part-two/#comment-87770 Hi Brian, Sorry for the late response, I've been a bit busy. What's the distro you are using? When it's a binary based distro you probably won't have got all the stuff installed to compile from source. You'll at least need gcc, binutils and the autotools. About the initrd, it finally worked out, but it's definitely ugly. Basically I just took the default way of creating an initrd for a module and added a little homwritten tool (see the bcmap blog post) to map the array to a fixed device node. Hi Brian,

Sorry for the late response, I’ve been a bit busy.

What’s the distro you are using? When it’s a binary based distro you probably won’t have got all the stuff installed to compile from source. You’ll at least need gcc, binutils and the autotools.

About the initrd, it finally worked out, but it’s definitely ugly. Basically I just took the default way of creating an initrd for a module and added a little homwritten tool (see the bcmap blog post) to map the array to a fixed device node.

]]> By: Brian Budge http://blog.affien.com/archives/2006/08/05/bcraid-drivers-part-two/#comment-87661 Brian Budge Wed, 04 Oct 2006 06:38:57 +0000 http://blog.w-nz.com/archives/2006/08/05/bcraid-drivers-part-two/#comment-87661 Hey Bas - I'm impressed that you've gotten at least some of this to work. I must say that my sys-admining skills are a bit lacking, and I'm having issues with my setup. Wondering if you could give some helpful hints :) My setup has 4 SATA drives set up in RAID10. I've created the RAID configuration, and my BIOS now sees one big fast drive. I'm using the gentoo 2006.1 LiveCD. I've been trying to get this RAID recognized by linux all day. I was very frustrated with only the binary drivers, and because of your page (and one other one), I finally found the driver source. I've been trying to build these drivers ever since, but no luck. I think this may come back down to my admining skills... I see lots of errors about things like "include/linux/autoconf.h no such file or directory". Now obviously there is a /usr/include/linux/autoconf.h, so I have a feeling that I need to have this code sitting in /usr or something when I build it. But this seems pretty strange to me :/ So, I guess I need to know where the source should be when I'm building it, and also how and where I should apply your patch. I guess that should be enough for me to actually recognize my array. Any progress on the initrd front? Thanks alot! Brian Budge Hey Bas -

I’m impressed that you’ve gotten at least some of this to work. I must say that my sys-admining skills are a bit lacking, and I’m having issues with my setup. Wondering if you could give some helpful hints :)

My setup has 4 SATA drives set up in RAID10. I’ve created the RAID configuration, and my BIOS now sees one big fast drive. I’m using the gentoo 2006.1 LiveCD.

I’ve been trying to get this RAID recognized by linux all day. I was very frustrated with only the binary drivers, and because of your page (and one other one), I finally found the driver source. I’ve been trying to build these drivers ever since, but no luck.

I think this may come back down to my admining skills… I see lots of errors about things like “include/linux/autoconf.h no such file or directory”. Now obviously there is a /usr/include/linux/autoconf.h, so I have a feeling that I need to have this code sitting in /usr or something when I build it. But this seems pretty strange to me :/

So, I guess I need to know where the source should be when I’m building it, and also how and where I should apply your patch.

I guess that should be enough for me to actually recognize my array. Any progress on the initrd front?

Thanks alot!
Brian Budge

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