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-   -   Raid 5 SATA setup - advice needed (http://www.linuxquestions.org/questions/linux-hardware-18/raid-5-sata-setup-advice-needed-607340/)

andy-holland 12-17-2007 09:35 AM

Raid 5 SATA setup - advice needed
 
Hi All - newbie here!

I'm wanting to set up a file server using 3 SATA discs. Running fedora core 7. I have an intel core 2 due processer (socket 775) and are wondering if anybody can suggest a motherboard (cheap but not cr*p) or at least what i need to look for?

sorry if i'm a DPM but i did try the search function to no avail

Many thanks in advance

Pearlseattle 12-17-2007 10:18 AM

May I ask you why you are asking this? :)
Is it because you want to know which motherboard has good hardware-RAID5 support for Linux and/or because you want to know which motherboard has good transfer rates because you're implementing software raid?

andy-holland 12-17-2007 10:24 AM

Quote:

Originally Posted by Pearlseattle (Post 2993425)
May I ask you why you are asking this? :)
Is it because you want to know which motherboard has good hardware-RAID5 support for Linux and/or because you want to know which motherboard has good transfer rates because you're implementing software raid?

Hmm... I'm a newbie to linux as well as this forum!

I was recommended Raid5 with hot swap for our file/mail server (at work) having looked at the specs on motherboards, i see quite a few of them don't support raid5. Is this not the case under software raid?

basically i need the best option all round for least money, and with relatively simple implementation.

Hope that helps.

Thanks, Andy

Pearlseattle 12-18-2007 04:10 AM

Well, to me honest I'm just about to start setting up software raid for my fileserver at home, so I'm not very experienced in it yet. Especially I don't know how good (or bad) the performance will be.
I did some research and apparently Linux Software RAID supports RAID 0,1,5, and 6. At home I will use two RAID 1 coupled together with LVM at the top which will give me the flexibility to expand the partition once it gets full.
I don't think software Raid supports hot swap (changing a broken HD with a brand new one on the fly), but you should better doublecheck - it might not be dependent on the software raid implementation but on the controller drivers of the kernel. Do you really need hot swap? Your mail server will have to be online 24/7/365/forever?
One of the reasons I will be using Software RAID is because I won't be bound to a specific RAID implementation of some product which might disappear in the future. You should take this as well into consideration - if you use hardware RAID through a motherboard or a separate controller and this will stop working after a few years, you won't probably be able to access your RAID without the original controller.
I PERSONALLY would try to avoid using the RAID controllers which are integrated in the motherboards - I never heard about anybody saying that they have a good performance and chances that a motherboard breaks down are for sure bigger than a single RAID card, as the motherboard incorporates more components.
What do you think?
:study:


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