https://slnotes.blog.castrillon.ch/linux/system/storage/Recent content in Storage on SL NotebookHugo -- gohugo.ioFri, 06 Mar 2026 17:09:21 +0100https://slnotes.blog.castrillon.ch/linux/system/storage/lvm/Fri, 06 Mar 2026 17:09:21 +0100https://slnotes.blog.castrillon.ch/linux/system/storage/lvm/LVM (Logical Volume Manager) is a linux tool that allows to group physical disks (also partitions) into groups. From these groups (as a pool), logical volumes can be carved out to use in the system. This layer of abstraction has the main advantage of making the logical volumes very easy to dynamically extend (as long as the supporting volume group has enough space) Creating a Logical volume Following the LVM hierarchy, first a PV (Physical Volume) object must be created for each physical device.https://slnotes.blog.castrillon.ch/linux/system/storage/external/Fri, 06 Mar 2026 16:38:24 +0100https://slnotes.blog.castrillon.ch/linux/system/storage/external/For server setups (specially in production environments),external storage solutions are used instead of built in disks. Here is an overview of different types: DAS (Direct Attached Storage) A DAS device is connected directly to a host (server). Given the direct connection is fast and performant For the Host OS, it is detected as a block device It is however dedicated to a single host NAS (Network Attached Storage) A NAS device is located apart from the hosts and communicates via networks Storage traffic has to go always to the network which can make it “slow” For the host OS, the device is exposed as a folder via protocols like NFS (see Filesystems.https://slnotes.blog.castrillon.ch/linux/system/storage/partitions/Fri, 06 Mar 2026 15:52:09 +0100https://slnotes.blog.castrillon.ch/linux/system/storage/partitions/Partitions are separated “logical drives” or segments inside a single (or more) real drives, but appear as different drives to the OS. Data is stored into different partitions for many reasons, including security or backup. In a linux system they can be seen with lsblk or fdisk -l <device> Concept Types There is 3 different types: Primary Partition: Used for booting an operating system. Traditionally, disks could have a maximum of four primary partitions.https://slnotes.blog.castrillon.ch/linux/system/storage/block_devices/Fri, 06 Mar 2026 15:51:10 +0100https://slnotes.blog.castrillon.ch/linux/system/storage/block_devices/Block devices are files that normally represent a piece of hardware that can store data (disks). These can be found under /dev/* The name block devices is given because data is written and read in blocks at a time The main way provided in Linux to see this devices is lsblk (List block). Here is an example output: NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT sda 8:0 0 119.2G 0 disk ├─sda1 8:1 0 100M 0 part /boot/efi ├─sda2 8:2 0 72.https://slnotes.blog.castrillon.ch/linux/system/storage/filesystems/Sat, 14 Jan 2023 11:41:41 +0100https://slnotes.blog.castrillon.ch/linux/system/storage/filesystems/What is it? A file system in Linux is the way in which files are stored, organized, and managed on a Linux operating system. It is responsible for managing the data on a storage device, such as a hard disk or solid-state drive, by dividing it into multiple sections or partitions. The file system determines the structure and organization of the files, as well as the methods used to access and modify them.