volume group Archive

Tracing I/O usage in Linux

Introduction We know quite few programs that help us identify I/O usage in Linux. In order to identify exactly what is writing and which process, we need to use quite few commands, to make sure we know exactly what is going on. I will show you few useful commands that will help you find your

Restoring deleted/resized logical volume

Calm yourself down Congratulations, you managed to accidentaly remove useful logical volume! No worries! Calm down, it’s all fine, we’ll get it back in few simple steps. Luckily, LVM archives all removed logical volumes when you make lvremove. In order to get it back we can use LVM’s native commands. All we have to do,

Creating, extending and shrinking logical volumes (LVM)

In earlier post I explained how to copy logical volumes over network, but I didn’t actually explain how to create LV’s and why exactly use them at all.  Few benefits of using LVM over old partitioning system: Spanning logical volume over many physical volumes, even if they reside on different physical disks (which isn’t really

Moving logical volume (LVM) over network

Sometimes you come to an issue of moving raw volume from one server to another. Now this can be pretty complicated thing. You could make a snapshot of LV or make an image file, which you would copy then to another server, but that takes ages. When creating image you also need almost double the