I have an intersting situation. Someone initially set up on of the servers and we had some major perfomance issues even though we had very good hardware. On further scrutiny we found that it was not using the second drive (sdb) and it was supposed to be mirrored. All the resources I have looked at seem a little complicated, I just want to activate mirroring so that reads can be faster. The second drive is in there just not being used. Please help.