Managing RAID Levels
----------------------
Compared to traditional disks, which have an MTBF of tens of thousands of hours, disk arrays
have an MTBF of millions of hours. Even when a disk in a RAID system fails, the array itself continues
to operate successfully. Most modern arrays automatically start using one of the spare disks,
called hot spares, to which the data from the failed drive is transferred. Most disk arrays also permit
the replacement of failed disks without bringing the system itself down (this is known as hot
swapping).


RAID and LVM configuration during installation
-----------------------------------------------
http://oracle-base.com/articles/linux/linux-software-raid.php
http://www.optimiz3.com/installing-fedora-11-and-setting-up-a-raid-0-1-5-6-or-10-array/

Software RAID->LVM
create /boot in hard disk
create /tmp /home and / on LVM


Preserving the Configuration:
To list what ARRAY lines are presently in use regardless of the configuration, run the following command as root:

mdadm --detail --scan

Use the output of this command to determine which lines to add to the /etc/mdadm.conf file. You can also display the ARRAY line for a particular device:

mdadm --detail --brief raid_device

By redirecting the output of this command, you can add such a line to the configuration file with a single command:

mdadm --detail --brief raid_device >> /etc/mdadm.conf






References:

http://www.buzzle.com/articles/raid-levels-explained.html
http://www.tcpdump.com/kb/os/linux/linux-raid-how-to/intro.html
linuxconfig.org/linux-software-raid-1-setup
http://www.sohoconsult.ch/raid/raid.html

How to configure RAID:
http://computernetworkingnotes.com/disk-managements/raid.html
http://www.tcpdump.com/kb/os/linux/linux-raid-how-to/configuring-raid.html(RAID5 Very very important)
https://access.redhat.com/site/documentation/en-US/Red_Hat_Enterprise_Linux/5/html/Deployment_Guide/s2-raid-manage-preserving.html
https://access.redhat.com/site/documentation/en-US/Red_Hat_Enterprise_Linux/5/html/Deployment_Guide/ch-raid.html

http://www.linuxhomenetworking.com/wiki/index.php/Quick_HOWTO_:_Ch26_:_Linux_Software_RAID#.UR98jvKC5_h(General)
http://www.cyberciti.biz/faq/linux-creating-software-raid-one-arrays/(RAID1)
http://www.sanitarium.net/golug/Linux_Software_RAID.html
http://vlinux-freak.blogspot.com/2011/01/how-to-implement-and-configure-raid-5.html
http://www.dedoimedo.com/computers/linux-raid.html(GUI RAID)
http://www.thegeekstuff.com/2008/07/step-by-step-guide-to-configure-hardware-raid-on-dell-servers-with-screenshots(Adding new hard disks)
http://www.thegeekstuff.com/2009/05/dell-tutorial-create-raid-using-perc-6i-integrated-bios-configuration-utility(very important)
http://wintual.wordpress.com/technologies/windows/using-the-graphical-user-interface-for-raid-creation/(very very important)
http://support.dell.com/support/systemsinfo/document.aspx?~file=/storage/raid/perc6/en/ug/html/chapterd.htm
http://support.dell.com/support/systemsinfo/document.aspx?~file=/storage/raid/perc6/en/ug/html/chapterj.htm


RAID Calculators:
http://wintelguy.com/raidcalc.pl
http://www.z-a-recovery.com/art-raid-estimator.htm(Online RAID calculator)


Dell PowerEdge PERC RAID BIOS utility:
http://saylinux.net/story/0011426/dell-tutorial-create-raid-using-perc-6i-integrated-bios-configuration-utility

RAID Alerting
-------------
http://www.tcpdump.com/kb/os/linux/raid-alerting.html