Here are the steps by which one can do mirroring in Linux running system after installation of the Operating system.<\/p>\n
1. #sudo apt-get install mdadm<\/p>\n
2. Partition the disk<\/p>\n
fdisk -l<\/p>\n
fdisk \/dev\/sdb (second hard disk)<\/p>\n
Change the partition type to auto raid (use m for options during partitioning)<\/p>\n
3. creating RAID<\/p>\n
# mdadm –create \/dev\/md0 –level=mirror –raid-devices=2 \/dev\/sdb1 \/dev\/sdc1<\/p>\n
results: mdadm: Defaulting to version 1.2 metadata<\/p>\n
mdadm: array \/dev\/md0 started<\/p>\n
This will create \/dev\/md0 virtual drive created from the two real block devices \/dev\/sdb1 and \/dev\/sdc1<\/p>\n
4. cat\u00a0 \/proc\/mdstat<\/p>\n
Personalities : [raid1]<\/p>\n
md0: active raid1 adc1[1] sdb[0]<\/p>\n
create mdadm.conf<\/p>\n
# sudo mdadm –detail –scan –v > \/etc\/mdadm\/mdadm.conf<\/p>\n
5. Create file system on the RAID<\/p>\n
sudo mkfs.ext4 \/dev\/md0<\/p>\n
(ignore the errors if come)<\/p>\n
6. sudo mkdir\u00a0\u00a0\u00a0 \/data\u00a0\u00a0 (creating directory so that we can mount our drive here)<\/p>\n
sudo mount\u00a0 \/dev\/md0\u00a0\u00a0 \/data (mount the virtual drive)<\/p>\n
sudo chmod\u00a0\u00a0 777\u00a0\u00a0 \/data (giving permissions)<\/p>\n
sudo chmod\u00a0 +t\u00a0\u00a0 \/data (By doing this other uses can view and add files but only the owner can delete the data)<\/p>\n
# echo “\/dev\/ md0 \/data\/ext4 defaults 1 2” >> \/etc\/fstab (append entries in fstab)<\/p>\n
<\/p>\n
your mirror is ready…. enjoy \ud83d\ude1b<\/p>\n
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