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• EVMS — Enterprise Volume Management System — Can do software RAID.

• LVM — Logical Volume Management

Software RAID / SoftRAID ∞

• raidtools — Tried and true.

(source not recorded):

Assuming you have data on sda1 and wish to mirror to sdb1, here are the steps I have used in the past:

• Make sure you have a full backup of your data on external device
• Create a degraded RAID1 (single device using sdb1)
• Mirror your data manually (maybe with tar) from sda1 to your raid device (md0 perhaps?)
• mount the raid device, reboot, etc … whatever you wish to be confident that your copy is intact (perhaps diff -rq (diff) )

• Once you’re confident that your one-legged raid is good to go bring sda1 into the fold (used to be raidhotadd, these days it’s mdadm --manage ???)

It would be good (perhaps essential?) to set the partition types on both partitions to raid autodetect.

VinumVM ∞

http://www.freebsddiary.org/vinum.php

• FreeBSD and OpenBSD have VinumVM. gvinum/gmirror/gstripe appear to be newer and in FreeBSD.
• The Vinum Volume Manager

• FreeBSD Handbook: The Vinum Volume Manager

Other ∞

• FreeBSD and OpenBSD have VinumVM. gvinum/gmirror/gstripe appear to be newer and in FreeBSD.
• gvinum
• gmirror

• gstripe

gstripe label -v -s somenumber data /dev/mumble1 /dev/mumble2

FreeBSD System Disk Mirroring: How to establish a RAID-1 for the system partitions

• GEOM Mailing List

Hardware RAID ∞

• https://web.archive.org/web/20100102121158/http://3ware.com/3ware_home.htm

  • well-known and loved.

• ARAID99-500 IDE RAID-1

  • With Hot-Swap, Auto-Rebuild and Remote Management

• Arco Hardware RAID

Resources ∞

• RAID Solutions for Linux
• Linux Software RAID info

• Booting off of a RAID-1 device