Linux MD RAID Gets Some Improvements For 4.9 Kernel - Phoronix
Show Your Support: Did you know that you can get Phoronix Premium for under $4 per month? Try it today to view our site ad-free, multi-page articles on a single page, and more while the proceeds allow us to write more Linux hardware reviews. At the very least, please disable your ad-blocker. Linux MD RAID Gets Some Improvements For 4.9 Kernel Written by Michael Larabel in Linux Storage on 8 Octobe
WARNING: mismatch_cnt is not 0 on /dev/md0 | へびにっき
Software RAID1を組んでいるサーバで、CentOS 5.3 -> 5.4にアップグレードしたところ、週末ごとに次のような警告メールが届くようになった。 /etc/cron.weekly/99-raid-check: WARNING: mismatch_cnt is not 0 on /dev/md0 /proc/mdstat 等には特に異常などは見当たらないし、構成の異なる複数のサーバで同じ現象が起こったので、ハード的な問題ではないだろうと判断し、忙しかったこともあってそのままにしていた。しかしやはり気持ち悪いので、きちんと調べてみた。 メール中にある通り、この警告は /etc/cron.weekly/99-raid-check というスクリプトから送信されている。このスクリプトを提供しているのは mdadm パッケージで、5.4で更新されている。更新内容はレッドハットのサイト
Mdadm Cheat Sheet
Mdadm is the modern tool most Linux distributions use these days to manage software RAID arrays; in the past raidtools was the tool we have used for this. This cheat sheet will show the most common usages of mdadm to manage software raid arrays; it assumes you have a good understanding of software RAID and Linux in general, and it will just explain the commands line usage of mdadm. The examples be
Increase the speed of Linux Software RAID reconstruction
If you are in a situation where you sit in front of the console (or on a remote ssh connection) waiting for a Linux software RAID to finish rebuilding (either you added a new drive, or you replaced a failed one, etc.) then you might be frustrated by how slow this process is running. You are running cat on /proc/mdstat repeatedly (you should really use watch in this case ;)), and this seems to neve
Recover Data From RAID1 LVM Partitions With Knoppix Linux LiveCD
Recover Data From RAID1 LVM Partitions With Knoppix Linux LiveCDVersion 1.0 Author: Till Brehm <t.brehm [at] projektfarm [dot] com> Last edited: 04/11/2007 This tutorial describes how to rescue data from a single hard disk that was part of a LVM2 RAID1 setup like it is created by e.g the Fedora Core installer. Why is it so problematic to recover the data? Every single hard disk that formerly was a
Recovery of RAID and LVM2 Volumes | Linux Journal
The combination of Linux software RAID (Redundant Array of Inexpensive Disks) and LVM2 (Logical Volume Manager, version 2) offered in modern Linux operating systems offers both robustness and flexibility, but at the cost of complexity should you ever need to recover data from a drive formatted with software RAID and LVM2 partitions. I found this out the hard way when I recently tried to mount a sy
Amazon Web Services Developer Community : Configuring Amazon EC2 for RAID
Take advantage of the Large and Extra Large instances by configuring them to use RAID for more fault tolerance or better disk throughput. AWS Products Used: Editor's Note: The following tutorial only applies to instances launched after December 6, 2007. By Marcin Kowalski and Bruce Gutman, Amazon Web Services A Redundant Array of Independent Drives (RAID) is a method of grouping multiple drive
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