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Hello, everyone.

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In this demo, I'm going to show you how to reduce and extend logical volumes.

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And also I'm going to show you how to extend group value.

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Finally, I'm going to show you how to remove physical volume, group volume and logical value.

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Before I'm going to create anything, I'm going to run the command LVS.

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As you can see here, these are the two logical volumes that we have created them.

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And also I can type the command LS block.

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As you can see here we have this is the device, and here are the two logical volumes and the mount

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points for these two logical volumes.

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So the first example, I'm going to reduce the logical volume.

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This one the LV underscore department one.

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Then I'm going to extend the LV underscore department two.

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So you can see here are the size of this logical value.

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And also this is the size of the second logical value.

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So I'm going to reduce this and extend this one.

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But before I'm going to do that, I'm going to unmount the two logical volumes.

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So I'm going to type U mount slash slash mapper then V one.

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Dash lv underscore Department one.

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I'm going to do the same thing for department two double check LZ.

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Block As we can see, we don't have the mount point for these two logical volume anymore.

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Right now.

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What we're going to do, we're going to reduce this one.

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LV Reduce.

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Then I'm going to use the option L that uppercase L.

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Since we're going to use the reduce, then I have to type minus and I'm going to reduce, for example,

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600MB.

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Then I have to use the option dash r.

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This dash R is going to reduce the underlying file system together with the logical value.

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Then I have to type the path of the logical value.

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VG one then slash.

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LV underscore Department one.

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Enter.

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Is going to resize right now the logical volume.

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As we can see here, we don't have the one gigabyte anymore for this logical volume.

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So I can double check here with the Vgs.

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As you can see, we have the free size right now with the 600 right now, I'm going to use this one,

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the 600 to assign it to to this logical value.

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So I'm going to use right now the extent.

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The extend command.

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Then I'm going to use the lowercase L because I want to assign whatever left here in the volume group

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to this logical value.

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So I'm going to use the plus.

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So we know the difference with the reduce here.

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I have used the minus and with the extend, I'm going to use the plus before the number or the size.

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Then I'm going to type 100.

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And the percentage sign free, then space.

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We don't forget the dash r in order to resize the underlying file system together with the logical value.

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Then def v one and v one slash and I'm going to type this one here, underscore Department two.

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And I'm going to hit Enter.

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And I'm going to type LVS.

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As you can see here, we have extended the logical value for the underscore department to I'm going

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to type Vjz.

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As you can see here, we don't have a free size left in this value group.

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Now, the next example, I'm going to extend the volume group.

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The Vichy one in order to use this the new size.

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To extend the two logical volumes else.

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Block So you can see we have a free disk.

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I'm going to use this single disk to assign it to this volume group.

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So as I said, I'm going to add a new disk as a storage device to the volume group.

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And this is an important point.

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We know about that.

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So the volume group we consider the volume group is like a single storage and we can add many devices

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storages in that volume group.

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Then I'm going to use the command V extend, I'm going to extend this volume group.

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Then I have to type the disk name or the path slash slash SD.

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I hit enter.

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Then as you can see here we have right now the one gigabyte.

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Available to this volume group.

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Now I'm going to do an x LVS.

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I'm going to extend this to logical value.

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So I'm going to type V extend.

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Then for the first one, I'm going to use a fixed size, so I'm going to use the uppercase L plus 700

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megabyte.

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Then dash R.

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We don't forget the dash R in order to resize the underlying file system together with the logical value,

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then the name or the path of that logical value.

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Department one.

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Hit.

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Enter.

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Perfect.

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I'm going to do that now for the next one.

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Just extend.

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And I'm going to use right now whatever lift.

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Let me check here.

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As you can see here, whatever left here, I would like to assign it to department.

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To hear lv underscore department so lv extend.

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Lowercase l then we don't forget the plus hundred and percentage sign.

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Three.

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Then we don't forget the AR dev vg one then slash NV underscore department too.

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Sometimes this path might not work so we can use another 1// mapper slash VG one then dash lv.

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Underscore department, too, but we will try here.

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It's worked.

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So we can go both ways because there is two baths or directories.

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Baths directories can point to to the same logical value.

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Clear the screen, LVS and v GS.

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As we can see here, we have extended the sizes of these to logical value and we can see for the volume

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group we don't have any size left here or a free size left in this value group.

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The last example I'm going to delete a remove the physical value and the group value and the logical

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value.

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So in this case, I'm going to start removing from the bottom.

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To the top.

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I'm going to type this commands just to explain.

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So I'm going to start to remove from the logical value first, then the volume group second, then the.

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The physical volume.

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The last one is going to be if we remember what we did.

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Indecision, how we can create the physical volume and the group volume.

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And the logical value what we did we have to start creating from.

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The top to the bottom.

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It's the opposite here in the removing.

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So we start from the bottom to the top.

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So what I'm going to do first right now, I'm going to.

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First, first thing I have to go to the etsy slash fstab.

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We already did the unmount.

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Just to double check that.

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We don't maybe do it here so we don't have any mount for this.

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Two logical volumes as we can see here.

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Also after we have added this disk to the volume group.

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So it's also we extend it and use the one giga to this two logical volumes.

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So now we don't have let me check over here.

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The grid.

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As we can see, we don't have the Mount Point.

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Also, we can see over here we don't have the mount point for these two logical volumes.

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So the first command right now, what I'm going to do, vim slash etsy slash fstab.

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Then I'm going to delete these two lines.

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I can delete them.

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Or I can.

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I cannot comment these two lines, so I don't want to use them anymore.

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Perfect.

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I'm going to save the file and exit.

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Elves.

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I'm going to right now to remove the logical value first.

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Def V1.

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And then lv underscore Department one.

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Yes.

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And the second one?

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Perfect.

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Yes.

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Then we need to move on.

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Just double check here.

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As you can see, we don't have this two logical volumes anymore.

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So I'm going to move on to the volume group.

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I need to delete the volume group.

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So what I'm going to type.

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We remove?

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Violin group remove then VG one.

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Hit enter vg s hit Enter.

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We don't have that volume group anymore.

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Last step the physical value for these two devices blocks.

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So I'm going to type p v remove.

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Then the disk, the path of the disk here, the name SDC, then dev SD hit enter.

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As you can see over here.

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BVS As you can see here, we don't have physical volume anymore.

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Block Can see over.

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I'm going to just clear the screen.

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As you can see here right now, we have two fresh and new disk.

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Last thing if I would like to use also this command part Puerto prop for this to just in case to inform

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that the operating system that we have made changes.

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So then def SD.

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Hit enter ls block perfect.

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As you can see here, we don't have any logical volumes right now for these two devices and also we

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don't have a mount points.

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Thus concludes our session.

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Thank you and see you in the next lesson.