RAID
From Docunext Technology Wiki
Contents |
Summary
A RAID is a redundant array of independent disks. I used to favor raid5, but now I am using raid10.
- RAID0 - no redundancy, speedy
- RAID1 - mirrored disks
- RAID5 - three or more disks required
- RAID6 -
- RAID10 - RAID1 over RAID0, speedy and redundant, but requires a lot of drives
Software RAID
I've used this on both Debian GNU/Linux (mdadm) and FreeBSD (geom) with great success.
Example:
$ cat /proc/mdstat
Personalities : [raid0] [raid1]
md1 : active raid1 sda3[0] sdb3[1]
239312192 blocks [2/2] [UU]
md2 : active raid0 sda2[0] sdb2[1]
7807360 blocks 64k chunks
md0 : active raid1 sda1[0] sdb1[1]
979840 blocks [2/2] [UU]
I want to try RAIDframe on NetBSD.
Hardware RAID
I've also used hardware RAID systems quite successfully, Adaptec, 3Ware cards and more recently Areca.
See Also
External Links
- http://www.miracleas.com/BAARF/RAID5_versus_RAID10.txt
- http://ftp.debian-unofficial.org/debian/pool/restricted/3/3ware-cli-binary-amd64/