Setup RAID Level 6 (Striping with Double Distributed Parity) in Linux – Part 5

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13 Responses

  1. Nige says:

    There is a small typo in this article. “and mount it under /mnt/raid5” should be “and mount it under /mnt/raid6”.

    Irrespective – very informative! Thanks.

  2. Akhil says:

    I have 8 old hdds varying from 80gb to 250gb in size.i want to create a redundant disk array using these disks and want to share it in lan so that others can store there file and thus make use of old hdds.have Dell precision t 3500 with win 7 have built in raid controller.can u help me to start this

  3. geogeotx says:

    Thank you for the very well documented article.

    1) My raid would disappear after each reboot. md0 would be gone. My theory is because of this command “mdadm –detail –scan –verbose >> /etc/mdadm.conf”

    When I changed location to /etc/mdadm/mdadm.conf then I think the raid survived reboot (this is an unconfirmed theory)

    2) Here are suggested commands to use “parted’ for drives greater than 2TB.

    sudo parted -a optimal /dev/sda
    (parted) mklabel gpt
    (parted) mkpart primary 1 -1 (or ==> mkpart primary 1MiB 512MiB ???)
    (parted) align-check
    alignment type(min/opt) [optimal]/minimal? optimal
    Partition number? 1
    (parted) set 1 raid on
    (parted) quit

    Thanks again for an excellent article

  4. Mike says:

    Hi ravi,

    I am using raid5(3disk – 600GB each) in LVM FS, so i get 1.8T LVM partition. Now I have to add new disk – 1TB in LVM. Do we have to add it in Raid or can we attach it directly and convert it into pv then extend vg..

    what could be the possible ways ?

    • Ravi Saive says:

      You should follow below procedure for extending your space..

      1. Add a new drive
      2. Use mdadm –grow to add it to the RAID5
      3. pvresize to increase the size of the PV
      4. lvextend to increase the size of the LV
      5. resize2fs to grow the filesystem

  5. Mrutyunjaya says:

    But how can i Up again that /dev/sdd1 partition ???

  6. Debasish says:

    What about Raid 5 that Ravi sir has promised to be published in Friday but haven’t. Is waiting for this.

  7. Omipenuin says:

    I think this Tut should be Part 4…….

    • Ravi Saive says:

      No, actually RAID 5 setup is the part 4 article, but we by mistakenly posted part 5. Part 4 will be published on Friday..

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