Centos – RAID1 and RAID5 configuration – LVM

centoslvmraid

I have a dedicated server, which has the following:

2 x 146GB drives in RAID1 - configured
3 x 600GB drives in RAID5 - unconfigured

The 2 x 146GB drives are currently dealing with everything, such as the OS, Apache, MySQL.

The 3 x 600GB drives, should be configured, but the server providers are trying to charge me through the roof to configure the RAID5 array.

I have been looking into configuring the server via LVM, but since I've never done this before, i was wondering if there was anything I needed to worry about/look out for as I don't want to mess up the current server.

I'd like the 3 x 600GB drives to be where my apache web root is. Would I need to create a symlink to a folder on here as my 'www' directory?

Has anyone come across any good tutorials that I could follow?

Thanks

Best Answer

The Arch Linux wiki has a phenomenal guide for RAID/LVM

If you don't have a hardware or firmware (fake RAID) solution for creating the RAID 5, I would make a software raid with mdadm then set the drive to mount as your www folder

Related Solutions

Lvm – Linux Software RAID1: How to boot after (physically) removing /dev/sda? (LVM, mdadm, Grub2)

You need to install GRUB to the MBR of both drives, and you need to do it in a way that GRUB considers each disk to be the first disk in the system.

GRUB uses its own enumeration for disks, which is abstracted from what the Linux kernel presents. You can change which device it thinks is the first disk (hd0), by using a "device" line in the grub shell, like so:

device (hd0) /dev/sdb

This tells grub that, for all subsequent commands, treat /dev/sdb as the disk hd0. From here you can complete the installation manually:

device (hd0) /dev/sdb
root (hd0,0)
setup (hd0)

This sets up GRUB on the first partition of the disk it considers to be hd0, which you've just set as /dev/sdb.

I do the same for both /dev/sda and /dev/sdb, just to be sure.

Edited to add: I always found the Gentoo Wiki handy, until I did this often enough to commit it to memory.

Linux – howto import existing linux soft array volume group

Maybe you can try to follow the recipe for moving volumes in the LVM Howto? Of course you'll skip a few steps there.

Best Answer

Related Solutions

Lvm – Linux Software RAID1: How to boot after (physically) removing /dev/sda? (LVM, mdadm, Grub2)

Linux – howto import existing linux soft array volume group

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