Published at LXer:
With 320GB SATA drives on sale with free shipping, I decided to increase my workstation’s RAID capacity for the last time. One nice things about SATA drives with Linux these days is you don’t ever need to shut the system down. In fact, with SATA, Linux software RAID, and the XFS filesystem I was able to add 320GB of capacity to the RAID filesystem without even unmounting it. During the entire time the system was completely usable, including all data on the RAID volume. Here is how I did it.