Over the weekend two more drives in my main ZFS pool started throwing errors. I just replaced a drive in the array, so I will get a ‘new’ drive to replace a failing one in a few weeks. However, the pool is a raidz1, which means there is only one parity drive. A two drive failure will toast the pool. This leads me to think I should beef up my backup server – which isn’t quite large enough to keep all the data from the main server. After I have a full backup, I’m tempted to convert my main tank to a raidz2 – which would allow two drives to fail simultaneously.

It’s only a couple hundred dollars to get it where it needs to be.