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We're finally trying to start doing things right by getting proper servers. We've got a HP server (With B110i but it's not being used as RAID controller) and it's running a CentOS 5 derivative with a few software RAID1 partitions setup.

My question is, now that we've setup the RAID, how should we maintain it? What do we do when a hard drive fails? What do we need to do to replace it OS wise? What's the best way to test it? Basically, how do we recover from typical failure scenarios? We don't have experience in managing a linux software RAID and whilst there's plenty of information on configuring them I haven't found general information about how to recover from an incident and we want to write scripts and documentation so when it does happen we know what to do.

Can any provide some information on the tools available and how to use them?

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I hate to say "read the manual" but you should read the manual. There are a few different ways to configure software RAID and how to recover from failure differs from implementation to implementation. If you're using mdadm, then you're in luck, because it's very well documented in more than one place.

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raid.wiki.kernel.org seems to be what I was looking for although I keep getting SSL errors when I access it. I skipped it the first time because of that. – damien79 Jan 20 '12 at 1:18
@user29743 If this solves your problem, them you should click on the check mark next to my answer to accept it. That way, future visitors can easily see that it's correct. faq – MDMarra Jan 20 '12 at 14:03

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