Software RAID in Linux Workstations

mkdir /raid

mount /dev/md0 /raid

where /raid is wherever the filesystem you created in step 5 will reside.

7. Edit your /etc/fstab file. You will need to comment out the lines containing the partitions that

are now in the RAID array, such as /dev/sda1 and /dev/sdb2, by adding a # at the

beginning of the line. Add a line for the RAID array filesystem:

/dev/md0 /raid ext3 defaults 0 1

Manual Configuration Examples

Most of the work in manual configuration of a software RAID array comes from the creation of the

appropriate /etc/raidtab file. The following are examples of /etc/raidtab files and the

corresponding mdadm commands needed to set up each of the basic RAID configurations supported

by HP.

RAID-0

/etc/raidtab file:

raiddev /dev/md0

raid-level 0

nr-raid-disks 2

nr-spare-disks 0

persistent-superblock 1

chunk-size 4

device /dev/hda1

raid-disk 0

device /dev/hdb1

raid-disk 1

Command:

mdadm -Cv /dev/md0 --level=0 --raid-devices=2 /dev/hda1 /dev/hdb1

RAID-1

/etc/raidtab file:

raiddev /dev/md0

raid-level 1