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BIOS
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UEFI
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<2TB
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>2TB
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max 4 partitions
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max 128 partitions
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Beyond 4: extended, logical partition
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All 128 are Primary
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fdisk utility
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gdisk utility
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cat /proc/partitiions
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List current partitions
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fdisk /dev/sdb
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Create MBR partition on /dev/sdb
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gdisk /dev/sdb
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Create GPT partition on /dev/sdc
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mkfs.ext4 -b 1024 -L myfs /dev/sdb1
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Create ext4 file system w/ myfs label (-L) and 1024Mb size (-b)
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mount /dev/sdb1 /mnt; umount /mnt
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Mount /dev/sdb1 on /mnt; unmount
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mkfs.xfs -L XFSFS /dev/sdb5
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Create xfs file system
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mount LABEL=XFSFS /mnt
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Mount
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mkfs.btrfs -L butter /dev/sdc1
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Create btrfs file system
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vim /etc/fstab
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/dev/sdb1 /ext4 ext4 defaults 0 0
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LABEL=XFSFS
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Mount by label
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mount -a
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Mount everything specified in fstab
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gdisk disk; fd00; partprobe
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Create RAID disks
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mdadm --create /dev/md0 --level=1 --raid-disks=2 /dev/sdd2 /dev/sde1
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Create RAID level 1 from 2 RAID disk
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mffs.ext4 /dev/md0
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Create file system on RAID
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mdadm --detail --scan >> /etc/mdadm.conf
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Write the RAID config
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mkdir /raid; mount /dev/md0 /raid
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Mount RAID to /raid
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vim /etc/fstab;
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Mount persistently
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cat /proc/mdstat
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Check the RAID if operational
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mdadm --detail /dev/md0
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More info about the RAID
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partprobe
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mkswap /dev/sdb6
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Create swap file system on /dev/sdb6
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free -m
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Show current swap
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swapon /dev/sdb6
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Turn swap on
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/etc/fstab
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Mounting automatically
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swapon -a
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fdisk /dev/sdb; n; l; w; partprobe
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Create the partition
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cryptsetup luksFormat /dev/sdb7; YES; pass;
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Create encrypted device
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cryptsetup luksOpen /dev/sdb7 secret
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Open the encrypted partiton to create file system
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mffs.ext4 /dev/mapper/secret
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Create file system on encrypted device
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mount /dev/mapper/secret /mnt
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Mount the device
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vim /etc/crypttab; secret /dev/sdb8
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/dev/mapper/secret /secret ext4 noauto 0 0
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gdisk /dev/sdc; 8e00; w; y; partprobe
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Create partition for LVM
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pvcreate /dev/sdc4
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Create physical volume
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vgcreate vgdata /dev/sdc4
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Put physical volume in volume group
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lvcreate -L 1G -n lvdata vgdata
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Create logical volume
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lvs
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Show current LV
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vgs
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Show current volume group
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pvs
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Show current physical volume
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/dev/mapper; ls -l
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List device mapper
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/dev/vgdata; ls -l
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//
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/dev/mapper/vgdata-lvdata /lvmountpoint ext4 defaults 0 0
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Mount in fstab
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dmesg | tail
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See errors
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tune2fs -L lvdata /dev/vdgata/lvdata
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Change volume label
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blkid
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Show UUID for all current file system
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etc/fstab/; UUID="...."
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Mount it
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df -h
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Show file system info
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gdisk /dev/sdc; partprobe /dev/sdc
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Create another partition
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vgextend *volumne group name /dev/sdc5
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Extend the volume group
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lvextend -l +100%FREE -r /dev/vgdata/lvdata
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Resize LVM to take 100% free storage
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mdadm --create /dev/md0 -l 5 -x 1 /dev/sdb /dev/sdc /dev/sdd /dev/sde
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Create RAID md0 level 5 w/ 1 hot spare (-x)
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mdadm --fail /dev/md0 /dev/sdb
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Fail a device
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mdadm --remove /dev/md0 /dev/sdb
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Remove the device from RAID array
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mdadm -- /dev/md0 /dev/sde
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Add new device to RAID array
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