All Questions
51
questions
2
votes
1
answer
841
views
How can I increase the size of lvm partition?
I have a ubuntu 18.04 system. I have a total of 3 partitions and in my third partition, I have an LVM partition. I need to increase the size of that partition. Here is the output of lsblk I need to ...
- 21
2
votes
0
answers
1k
views
Why is the read/write speed of two SSDs so slow when mounted as single logical volume with LVM under Ubuntu 18.04 LTS?
For scientific computing, we need fast read/write speeds. So I upgraded one of our machines with 2 SSDs. I used the command
hdparm -Tt /dev/sda
to test the read speed. As reference, our standard HDDs ...
0
votes
0
answers
417
views
How to backup a bare-metal Ubuntu server with MySQL running 24/7 with zero downtime?
I've been researching this for a long time but I cannot find a satisfying solution. People tend to:
Backup Linux systems with rsync - which is good if you want to backup a lot of standalone files but ...
- 121
0
votes
1
answer
165
views
LVM size only 4G than 52G but should be 200G
Hi had and still have some very strange problems with a Server Ubuntu 18 LTS and LVM
First only 4GB seemed to have been used while creating the host during setup, which was dedected much later after a ...
- 1
1
vote
1
answer
706
views
lvm: metadata demon deprecated, unavailable in 20.04 and higher?
The Logical Volume Manager (lvm) metadata daemon seems to be available (and recommended to be in a running state) in Ubuntu up to version 18.04 LTS, but for 20.04 it is not even available
sudo ...
- 5,024
0
votes
1
answer
286
views
Is it safe to do-release-upgrade Ubuntu Server 16.04.7 to 18.04.5 when root partition is on lvm?
I have an Ubuntu 16.04 Server that runs
Linux 4.4.0-187-generic #217-Ubuntu SMP Tue Jul 21 04:18:15 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux, all packages are very recent (I regularly perform standard ...
- 5,024
0
votes
1
answer
359
views
problem changing UUID UBUNTU SERVER 18.04
root@machinename:/dev/mapper# pvchange --uuid /dev/mapper/ubuntu--vg-ubuntu--lv
Failed to find physical volume "/dev/ubuntu-vg/ubuntu-lv".
0 physical volumes changed / 0 physical volumes not ...
- 1
1
vote
1
answer
3k
views
trying to resize root partition using lvm doesn't work
I'm working on an ubuntu 18.04 server. For the last few days I keep getting the error message "No space left on device" when doing simple things like ll.
I have found out that it has something to do ...
- 111
0
votes
1
answer
65
views
Changes have lost on mirrored volume
I have a 512GB mirrored volume, which has a snapshot on the volume of same size:
LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert
mirror vg1 owi-a-r-r- ...
- 143
0
votes
1
answer
67
views
Installing 18.04 on a preexisting Ubuntu 16.04 LVM setup
I'm trying to install Ubuntu 18.04 on my computer.
I have one harddrive that looks like so:
sda
- sda1: /boot/efi
- sda2: /boot
- sda3: [LVM:ubuntu-mate-vg]
- swap_1
- cryptswap1
- /...
- 1,103
0
votes
0
answers
45
views
Ubuntu 18.04.3 Server Edition Installation failing
I'm trying to install Ubuntu 18.04.3 Server Edition previously downloaded from 64-bit PC (AMD64) server install image: cdimage.ubuntu.com/releases/18.04.3/release/ubuntu-18.04.3-server-amd64.iso,
and ...
- 247
0
votes
0
answers
3k
views
uninitialized urandom read error appearing in dmesg
I'm using:
OS: Ubuntu 18.04.3 LTS x86_64
Kernel: 4.15.0-72-generic
After the machine finishes to boot, I run into the following errors in the kernel log by running dmesg:
[ 0.000000] random: ...
4
votes
1
answer
2k
views
18.04, grub takes about 6 minutes to boot, problem: `systemd-udevd 'SomeDevice' is taking a long time`
after a whole system update (that I try to avoid usually), I thought I was unable to boot, but this time I decided to wait more.
so after exactly 6m05s (everytime is that precise delay) it finally ...
- 4,079
1
vote
2
answers
354
views
How to better allocate diskspace in a VM?
I tried searching but with the terms I used I couldn't find anything similar.
I'm running Ubuntu server in multiple VMs on my Proxmox machine. I frequently run into this issue on my VMs and I don't ...
- 11
1
vote
2
answers
2k
views
Partitioning 2 SSDs (1TB NVMe SSD and another 1TB SSD) for Ubuntu 18.04
My laptop currently has only a 256GB SSD which has Windows 10 pre-installed on it. I don't need Ubuntu to be installed on this SSD, so I will remove this drive. I am planning to remove the Windows 10 ...
