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Configuration

Configuration

Centos

  1. Prerequisites
  2. Install EPEL Packages yum install epel-release
  3. Install ntfs-3g and fuse packages to support NTFS drives yum install ntfs-3g fuse -y

  4. Format the new NTFS filestsystem to xfs mkfs.xfs -f /dev/sda

  5. Identifying Additional HDD

Run blkid to verify if HDD is detected. On detection of HDD, follow the below steps to configure as XFS file system. * Run fdisk -l to list the devices, partitions and volume groups * Scan your hard drive for Bad Sectors or Bad Blocks 1. Partitioning HDD (Optional and for Primary HDD) * On identifying the device(HDD), say /dev/sda as the target device to partition, run fdisk /dev/sda * These steps below are not for secondary HDD as partitioning will not utilize the entire space * Option m to list the operations, Option p to print the current partitions * Note the start and end block ids of the current partitions * Option d to delete the current partitions, select the partition to delete 2 * Option n to create new partition, select only 1 partition for the HDD, select default start and end block id, it should match the one printed above * Option t to select the type of partition, followed by 8e to select as Linux LVM * Format the new partition to xfs mkfs.xfs -f /dev/sda1 as only one partition was created * Mount the new partition to test mount -t xfs /dev/sda1 /data * Make entry in /etc/fstab to make it permanent * Verify the mounted partition by running df -Th to see free and used space

  1. Securing Drive and adding Redundancy
  2. Software RAID and LVM
  3. For the partitions that are needed as Raid 1, use fdsik /dev/sdb3,Press ‘t’ to change the partition type.
  4. Press ‘fd’ to choose Linux Raid Auto.
  5. Install Raid 1 on /dev/sdb3 and /dev/sda1 using mdadm --create /dev/data --level=1 --raid-devices=2 /dev/sdb3 /dev/sda1

  6. Encrypting Raid devices

  7. Volume Group Setup

Logical Volume Manager (LVM) is a software-based RAID-like system that lets you create "pools" of storage and add hard drive space to those pools as needed. * LVM Basic * Create, expand, and encrypt storage pools

  1. Volume Group Lifecycle
  2. Migrate Data from one LV to another
  3. Identify the current Physical Volume and Volume Group mapping pvscan or pvs
  4. List the partitions and volumes in the Volume Groups vgdisplay centos-digital -v
  5. Logical volume and device mapping lvs -o+devices
  6. List all devices and device mapping lsscsi
  7. Before Reducing logical volume, move to another drive
  8. Format /dev/sdb3 to a physical volume: pvcreate /dev/sdb3
  9. Give /dev/sdb3 to the volume group centos-digital: vgextend centos-digital /dev/sdb3
  10. Migrate our logical volume Users from /dev/sdb2 to /dev/sdb3, pvmove -n Users /dev/sdb2 /dev/sdb3
  11. Verify if the data is migrated lsblk
  12. Reduce your logical volume to make place for your new partition lvresize -L 25G /dev/centos-digital/home
  13. Use fdisk to reduce the size of /dev/sdb2 to 80G as total for volume group centos-digital was 75G (yes, a little bit bigger as we used in lvresize!)
  14. Use fdisk to create a new LVM partition, /dev/sdb3, with the new available space (it will be around 400G).
  15. Check if the kernel could automatically detect the partition change. See if /proc/partition matches the new state (thus, /dev/sdb3 is visible). If not, you need to reboot. (Probably it will.)
  16. Make /dev/sdb2 to be as big again pvresize /dev/sdb2