Linux logical volume manager7/27/2023 ![]() ![]() When using whole disks you don't need any special preparation. The pvcreate command initializes a disk or partition as a physical volume for use with the volume manager. If you are completely new to the concept of logical volume management, you may wish to read more about it in the RHEL6 Logical Volume Manager Administration. This flexibility in space allocation is only one aspect of the usefulness of logical volume management, but it is the only one considered in the Red Hat certification exams. If a file system becomes full it can be extended by adding a new physical volume (disk or partition) to the volume group, then simply extending the logical volume. This way a single file system can span many disks. A logical volume is built on top of a volume group, which in turn is created using one or more physical volumes (disks or partitions). Using logical volume management, a file system is built on a logical volume. Without a volume manager, once you have used all the space on a disk your file system can not be extended any further. Logical volume management provides a level of abstraction between a file system and the physical disks or partitions. Linux Unified Key Setup (LUKS) Encrypted File Systems.Linux File Systems (mkfs, mount, fstab).Linux Disk Partitioning (fdisk, parted).Logical Volume Manager GUI (system-config-lvm).Logical Volumes (lvcreate, lvextend, lvreduce, lvremove, lvdisplay).Volume Groups (vgcreate, vgextend, vgreduce, vgdisplay).Remember, the exams are hands-on, so it doesn't matter which method you use to achieve the result, so long as the end product is correct. This article gives an introduction to Logical Volume Management (LVM) in Linux, with specific reference to the information needed for the RHCSA EX200 and RHCE EX300 certification exams. Home » Articles » Linux » Here Linux Logical Volume Management ![]()
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