The Software RAID HOWTO

For the raidreconf RAID reconfiguration tool, please see this page.
If you want to monitor your Linux Softare RAID devices, check out The SysOrb - it's a commercial monitoring package, which supports other checks such as IDE SMART monitoring as well as the normal system metrics (load, memory, filesystem free space) etc. etc. etc.
Well, over the years a great many people have written back with corrections, suggestions, thanks, and all kinds of useful, fun and nice mails. Only one exception - but he deserves a mention ;)