http://www.ahfx.net/weblog/182
- Remove bad disk (hot swap so no need to power down the machine)
- Replace with a good disk of same size or larger
- It automatically rebuilds the array
- Once the rebuild goes to 100% it still showed in degraded state
- Clear logs
- Clear alert log
- Do a global rescan
- Everything shows a good status and running without problems.
I was very nervous about pulling drives on the fly, but everything went well.