Linux Software RAID and SATA Hot Swap

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I know there are a million pages online about Linux Software RAID, but I wanted to record my own experience with it.

My home server has four RAID1 arrays:

  • 160GB, for my boot volume, on one of the motherboard's RAID controllers
  • 500GB, for backups, again on a RAID controller
  • 2TB, for documents and virtual machines, on a RAID controller
  • 3TB, for other stuff, using software RAID.

My motherboard is a number of years old now, and the onboard controllers could not do RAID for 3TB drives, as they only recognized them as 873GB. So I left these as standard drives, and set them up in software RAID.

My goal for this endeavor was to convert my 500GB and 2TB over to software RAID. The reasons being:

  • Actually getting notifications regarding any issues
  • Control over rebuilds, being able to add/remove disks
  • Not being tied to a specific RAID controller with a specific firmware version. If the motherboard were to die, I can easily move the drives.

The minor performance hit isn't an issue, so the pros far outweigh the cons.

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