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Kenneth: /* Larger than 2TB RAID */
2019-01-30T17:07:46Z
<p><span dir="auto"><span class="autocomment">Larger than 2TB RAID</span></span></p>
<p><b>New page</b></p><div>== parted ==<br />
<br />
GNU Parted - a partition manipulation program<br />
<br />
Used by OpenELEC to create SD card partitions: (create_sdcard)<br />
<pre><br />
DISK = /dev/sdh<br />
<br />
# writing new disklabel on $DISK (removing all partitions)...<br />
parted -s /dev/sdh mklabel msdos<br />
<br />
# creating partitions on $DISK...<br />
parted -s "$DISK" unit cyl mkpart primary fat32 -- 0 16<br />
parted -s "$DISK" unit cyl mkpart primary ext2 -- 16 -2<br />
<br />
# make partition active (bootable)<br />
parted -s "$DISK" set 1 boot on<br />
<br />
# tell kernel we have a new partition table<br />
partprobe "$DISK"<br />
<br />
# create filesystem<br />
# creating filesystem on $PART1...<br />
mkfs.vfat "$PART1" -I -n System<br />
# creating filesystem on $PART2...<br />
mkfs.ext4 "$PART2" -L Storage<br />
<br />
# sync disk<br />
sync<br />
</pre><br />
<br />
== Larger than 2TB RAID ==<br />
<br />
<br />
To get larger than 2TB you need GPTs<br />
<br />
parted /dev/sdb<br />
mklabel gpt<br />
print free<br />
mkpart primary 1M 4TB<br />
p<br />
set 1 raid on<br />
align-check optimal 1<br />
q<br />
<br />
mdadm --create --verbose /dev/md0 --level=5 --raid-devices=4 /dev/sd[iklm]1<br />
<br />
mkfs.ext4 /dev/md0 -L /ci<br />
<br />
cat /proc/mdstat<br />
<br />
---<br />
<br />
parted -a optimal /dev/sdf<br />
<br />
<br />
Ref:<br />
* server - How can I create a RAID array with >2TB disks? - Ask Ubuntu - https://askubuntu.com/questions/350266/how-can-i-create-a-raid-array-with-2tb-disks<br />
* A guide to mdadm - Linux Raid Wiki - https://raid.wiki.kernel.org/index.php/A_guide_to_mdadm<br />
* Using parted to create a RAID primary partition — Lucid Solutions - https://plone.lucidsolutions.co.nz/linux/io/using-parted-to-create-a-raid-primary-partition<br />
<br />
== Tools ==<br />
<br />
=== lsblk ===<br />
<br />
List block devices:<br />
lsblk<br />
<br />
How To - Linux List Disk Partitions Command - nixCraft - https://www.cyberciti.biz/faq/linux-list-disk-partitions-command/<br />
<br />
=== List SCSI Devices ===<br />
<br />
lsscsi<br />
<br />
== Use different unit ==<br />
<br />
parted -ls /dev/sda 'unit s'<br />
parted /dev/sda 'unit s print'<br />
<br />
[parted] How to list start/end/size sectors? - https://www.linuxquestions.org/questions/linux-software-2/%5Bparted%5D-how-to-list-start-end-size-sectors-4175461903/<br />
<br />
== Specify TB ==<br />
<br />
unit TB<br />
unit GB</div>
Kenneth