Linux Software Raid Howto
Mdadm is a linux utility used to manage and monitor software raid devices. Software raid creates the equivalent of a single raid virtual disk drive made up of all the underlying regular partitions used to create it.
How To Set Up Software Raid 1 On An Existing Linux Distribution
Software raid 5 on linux is the best raid.
Linux software raid howto. We just need three hdds and a few hours. This howto describes how to use software raid under linux. This is the raid layer that is the standard in linux 24 and it is the version that is also used by linux 22 kernels shipped from some vendors.
Software raid is one of the greatest feature in linux to protect the data from disk failurewe have lvm also in linux to configure mirrored volumes but software raid recovery is much easier in disk failures compare to linux lvm. You have to format this new raid device before your linux system can store files on it. Have you found the linux software raid howto.
Formatting however causes all the old data on the underlying raid partitions to be lost. This howto describes how to use software raid under linux. This is the raid layer that is the standard in linux 24 and it is the version that is also used by linux 22 kernels shipped from some vendors.
Furthermore it does not treat any aspects of software raid in other operating system kernels. It is used in modern gnulinux distributions in place of older software raid utilities such as raidtools2 or raidtools. I have similar setup in the server on my network 4 drives having software raid5 not 3 but very similar.
Mdadm is free software maintained by and copyrighted to neil brown of suse and licensed under the terms of version 2 or later of the gnu general public license. Its cheaper than hardware raid with a proper 400 controller. This howto does not treat any aspects of hardware raid.
When describing raid setups it is useful to refer to the number of disks and their sizes. It addresses a specific version of the software raid layer namely the 090 raid layer made by ingo molnar and others. This site is the linux raid kernel list community managed reference for linux software raid as implemented in recent version 4 kernels and earlier.
As the subject says. I have seen some of the environments are configured with software raid and lvm volume groups are built using raid devices. It has better speed and compatibility than the motherboards and a cheap controllers fakeraid.
Booting directly from raid only system is somewhat complicated. How to do it. Thats very wrong good luck doing software raid with windows have fun with that windows cant exist on a striped partition linux can be installed on a software raid however boot must be on a separate partition as for ubuntu you need to grab the alternate install cd which is easy to setup a raid on not the standard install cd.
It should replace many of the unmaintained and out of date documents out there such as the software raid howto and the linux raid faq. In this howto the word raid means linux software raid. Are there something special to consider.
It addresses a specific version of the software raid layer namely the 090 raid layer made by ingo molnar and others. Lets make a software raid 5 that will keep all of our files safe and fast to access.
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