Comments on: How to Create a VDO Volume On a Storage Device on RHEL 8

By: kucridd

kucridd — Mon, 28 Mar 2022 05:11:00 +0000

In reply to Raju.

Minimum required size for VDO volume: 5063921664 bytes

By: Raju

Raju — Thu, 04 Feb 2021 08:11:12 +0000

What is the minimum size of the backend storage device to create vdo device?
~~~
Creating VDO vdodisk
vdo: ERROR – vdoformat: formatVDO failed on ‘/dev/disk/by-id/ata-QEMU_HARDDISK_QM00003-part2’: VDO Status: Out of space
~~~

By: Nelson

Nelson — Sun, 18 Oct 2020 06:57:54 +0000

I keep getting the errors below when trying to create a VDO.

Creating VDO vdo1

vdo: ERROR - Kernel module kvdo not installed
vdo: ERROR - modprobe: ERROR: could not insert 'kvdo': Required key not available

However, when I try to install it I get this message.

Package vdo-6.2.2.117-13.el8.x86_64 is already installed.
Package kmod-kvdo-6.2.2.117-65.el8.x86_64 is already installed.
Dependencies resolved.

And yes my vdo is active and enable, please see below message
● vdo.service – VDO volume services
Loaded: loaded (/usr/lib/systemd/system/vdo.service; enabled; vendor preset: enabled)
Active: active (exited) since Sun 2020-10-18 01:22:02 CDT; 32min ago
Process: 1023 ExecStart=/usr/bin/vdo start –all –confFile /etc/vdoconf.yml (code=exited,>
Main PID: 1023 (code=exited, status=0/SUCCESS)
Tasks: 0 (limit: 23336)
Memory: 0B
CGroup: /system.slice/vdo.service

Oct 18 01:22:00 s1.centos8 systemd[1]: Starting VDO volume services…
Oct 18 01:22:02 s1.centos8 systemd[1]: Started VDO volume services.

Am using centos8 4.18.0-193.19.1.el8_2.x86_64. Thanks!

By: James Kiarie

James Kiarie — Mon, 03 Feb 2020 09:50:50 +0000

Thanks for that pointer Kingneutron. Let me give a shot with the modprobe command in loading the vdo module.

By: Kingneutron

Kingneutron — Fri, 31 Jan 2020 17:43:17 +0000

This is a common bug and the workaround is to simply reboot your server.

No. This is Linux, not Windows. ‘modprobe vdo‘ and should be good to go.

Also, you should be able to create a file-based VDO device instead of having to use a partition. I will be experimenting with this.