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Configuring_3TB_HD.md

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Configuring 3TB HD

Instruction to configure two 3TB (or 4TB) HDs in Raid0 or Raid1:

  • Get root
sudo -E -s
  • Navigate to sbin directory
cd /sbin
  • Partition the first drive with GNU parted (to make a GPT file format so that 3TB+ drives work)
./parted /dev/sda
mklabel gpt
unit TB
mkpart primary 0.00TB 3.00TB #(4.00TB for 4tb but I haven't tried it).
print
quit
  • Partition the second drive with GNU parted
./parted /dev/sdb
mklabel gpt
unit TB
mkpart primary 0.00TB 3.00TB
print
quit
  • Make the raid0 array with a blocksize of 128 (the blocksize is defaulted to 64, but 128 might be more desireable)
./mdadm --create /dev/md0 --level=0 --chunk=128 --raid-devices=2 /dev/sda1 /dev/sdb1
y

or

  • Make the raid1 array
./mdadm --create /dev/md0 --level=1 --chunk=128 --raid-devices=2 /dev/sda1 /dev/sdb1
y
  • Wait for sync Takes Long Time Mine took 4 1/2 hours watching
cat /proc/mdstat (also shows in web interface)
  • Make the USB Stick a swap partition and mount it as swap drive
./mkswap /dev/sdc
./swapon /dev/sdc
  • Then we partition the drives to XFS filesystem
./mkfs.xfs /dev/md0
  • Then we are going to text edit the fstab system (this system mounts the drive at startup)
nano /etc/fstab

Remove the # in front of or add this line:

/dev/md0 /home xfs defaults,bsdgroups,noatime,nodiratime 0 0

Then as a finishing very important touch we make sure that the raid0 array is remembered at startup

./mdadm -Q --detail --brief /dev/md0 > /etc/mdadm.conf

Then reboot the device

./reboot

Wait a few minutes, you should see the device boot. The HDD leds will go from green to orange for a few seconds, don't worry they will become green again and you should hear the HDD's working. This is probably the stora finalizing the partition so that it's ready for use.