Show pagesourceBack to top Share via Share via... Twitter LinkedIn Telegram Yammer RedditRecent ChangesSend via e-MailPrintPermalink × Table of Contents Benefits Commands Terminology Striping ("RAID-0") LVM: convert linear to striped RAID-1 only one disk Articles Logical Volume Manager Partition type: 8e00 (Linux LVM) see also: LVM – ArchWiki LUKS (encryption) Benefits LVM mainly offers the following benefits which a classical MBR or GPT partition layout cannot offer due to its nature of having to reside in a partition table with physical sector boundaries. increased abstraction, flexibility, and control. Logical volumes can have meaningful names like databases or root-backup. Volumes can be resized dynamically as space requirements change and migrated between physical devices within the pool on a running system or exported easily. LVM also offers advanced features like snapshotting, striping, and mirroring.1 Commands ready drive for LVM pvcreate create a new VG vgcreate NAME PVNAME show logical volumes lvdisplay enlarge LOGICALVOL by 10GB lvresize --size +10G LOGICALVOL create logical volume with 10GB in vg0 lvcreate -L 10G vg0 -n NAME Terminology PV Physical Volume (e.g. a disk; can contain a LV) LV Logical Volume LVM Logical Volume Manager LE Logical Extent PE Physical Extent VG Volume Group (grouping of one or more PVs) VGDA Volume Group Descriptor Area Striping ("RAID-0") LVM: convert linear to striped This requires temporarily having 2x the size of your LVM volume. You need to create a mirror of your data, with the new leg of the mirror striped over the target disks, then drop the old leg of the mirror that was not striped. If you want to stripe over ALL of your disks (including the one that was already used), you also need to specify --alloc anywhere otherwise the mirror code will refuse to use any disk twice. # convert to a mirror (-m1), with new leg striped over 4 disks: /dev/sdb, /dev/sdc, /dev/sdd, /dev/sde # --mirrorlog core - use in-memory status during the conversion # --interval 1: print status every second lvconvert --interval 1 -m1 $myvg/$mylv --mirrorlog core --type mirror --stripes 4 /dev/sd{b,c,d,e} # drop the old leg, /dev/sda lvconvert --interval 1 -m0 $myvg/$mylv /dev/sda RAID-1 only one disk mdadm --create /dev/md0 --verbose --level=1 --raid-devices=2 missing /dev/sdb1 Articles PCIe Bifurcation and NVMe RAID in Linux Part 2: Benchmarks and Encryption (Delightly Linux, 2023-04-10. Archive: org, ph) [1] https://www.digitalocean.com/community/tutorials/an-introduction-to-lvm-concepts-terminology-and-operations Last modified: 2023-10-23 04:54