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I have 3 hds, one of 500G which I installed Ubuntu 10.10 on, and two of 1TB each which I'd like build a RAID 0 volume on. My question are:

1) What are the pros and cons of using my motherboard RAID or Linux Software RAID?

2) How do I safely mount /home on that RAID volume?

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up vote 1 down vote accepted

Linux software RAID is pretty good. If you have a high-end motherboard the hardware RAID me be faster, but the software RAID is going to be a lot more flexible, and you'll have all the tools for configuring it at your fingertips without having to boot into BIOS.

See the mdadm man page and the various documentation here.

How do I safely mount /home on that RAID volume?

I'm not sure what you're asking here...mounting a RAID device is just like mounting any other device; you put an entry in your /etc/fstab file and the system will mount it automatically when it boots. RAID devices are typically named /dev/md0, /dev/md1, and so forth, so your fstab might have an entry like this:

/dev/md0         /home            ext4    defaults              0       1
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by "safely mount" I meant: how do I setup fstab (answered) and how do I safely move /home from non-raid disk to the raid disk? – Gatis Jan 23 '11 at 12:47
Actually, I just discovered RAID support in Ubuntu's Disk Utility. Great tool. Just do "File" > "Create" > "RAID array...". – Gatis Jan 23 '11 at 13:12
Moving /home: – Gatis Jan 23 '11 at 13:34

High-end motherboards, as mentioned by larsks, should not be taken to mean motherboards that have "fakeRAID" support. If you have one of those then you will have a much better time using Linux soft raid, unless you want to dual boot another OS on the same drive array.

Read up on Ubuntu FakeRaid support if you fall into this category and want to pursue it.

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