December 2002
Intermediate to advanced
260 pages
9h 18m
English
Content preview from Managing RAID on LinuxBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.
A Brief History Lesson
Although kernels prior to 2.0.35 shipped with some RAID support, it wasn’t until the release of 2.0.35 that support for RAID-1, RAID-4, and RAID-5 became available. The multiple devices (md) driver that provides kernel RAID support is currently at version 0.90. The latest stable kernels in the 2.0 and 2.2 series ship with an outdated version (0.36) of the software RAID driver. Patches for the 0.90 code are available for these older kernels (see the sections below on Kernel 2.2 and Kernel 2.0). Kernels prior to 2.0.35 ship with version 0.35 of the md driver and should not be used, except if you absolutely have to keep them in operation for legacy reasons.
The 0.90 code was finally merged with the kernel source tree during the 2.3 development phase, so 2.4 ships with the latest RAID code. So will all subsequent stable and development kernels. In general, it’s best to run at least a 2.4 series kernel when using software RAID, or a 2.2 kernel with the proper RAID patches applied. Using the old 0.36 driver is not recommended.
Along with drivers to provide software RAID for Linux, a set of utilities for managing, configuring, and tuning software arrays has emerged. These utilities, collectively called the RAID Tools (raidtools is the package name), are maintained by Ingo Molnar and Erik Troan of Red Hat and are now included with many major distributions. Molnar also served as the primary developer and maintainer of the software RAID subsystem from version 0.36 through ...
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Read now
Unlock full access
More than 5,000 organizations count on O’Reilly
O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.