Create NEW raid 1 device and mount for mysql

Discussion in 'Installation/Configuration' started by ShadoweElf, Sep 29, 2012.

  1. ShadoweElf

    ShadoweElf New Member

    Hi all

    I have a perfect setup centos 6.2 with ispconfig 3 installed.
    It is a production server.

    Database are very big (100 G) and I want to add a raid ssd device for mysql

    I want to buy 2 ssd hdd, create a raid1 device and mount it in /var/lib/mysql where is the deault folder.

    I need help because is a production server. With a test server I can try and play, but I can't do test's in my situation...

    i'm looking for something like a perfect setup

  2. falko

    falko Super Moderator Howtoforge Staff Moderator HowtoForge Supporter ISPConfig Developer

    This isn't possible without stopping MySQL for some seconds. You must mount your RAID device somewhere, stop MySQL, copy /var/lib/mysql to the new device, rename /var/lib/mysql to something else (like /var/Lib/mysql_old), create a new and empty /var/Lib/mysql directory, remount the RAID device to /var/lib/mysql, chown /var/lib/mysql to mysql:mysql, and start MySQL.
  3. ShadoweElf

    ShadoweElf New Member

    thx falco

    Thx falco, but I need the commands to run

    I have unformatted devices sdc and sdd

    I want to know how I create a new ext4 raid1 device...

  4. Puck

    Puck New Member

    Read man mdadm. it's very clear :cool:

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