Disk and Partitioning

Disk Patitioning utility

Another Disk partitioning utility

is used to check the output of variouse commands

cat /proc/partition | grep hd

cat /proc/partitions | grep SD

to list the current partitions on all disks

View all partitions using parted

create partitions

Logical Volume MNGT

• pvs- Display Physical Volumes
• vgs - Display Volume groups
• lvs - Displays logical Volumes
• pvdisplay - Diplays detailes information on physical volumes.
• vgdisplay - Displays detailed information on Volume groups
• lvdisplay - Displays detailed infromation logical volumes
• pvcreate - creates a new physical volume
• vgcreate - creates new volume groups
• lvcreate - creates new logical volume
• vgextend - extends an existing volume groupe
• lvextend - extends an existing volume group
• lvresize - Resizes a logical volume
• lvreduce - Reduces a logical volume
• lvrename - Rename a logical volume
• pvmove - Moves / Migrates Data from one physical volume to another

two units

Physical Extents are used dealing with volume groups and logical groups

deal with logical extents

Striping disks together to form one large disk

Mirroring disks are copied from one another allowing for redundancy, should one disk fail the other one take sover.

Striping with Parity disks are similar to Raid 0 and are join together to form one large drive, the difference here is that 25% of the disk is used for parity bit.