I'm currently building a backup server for a few of the machines in the office. I plan to run ubuntu 10.04 LTS on it.

My current setup is:

2 x 1TB disks in software RAID 1 configuration

2 x 2TB disks in software RAID 1 configuration

My original idea had been to mount the filesystem on the 1TB Raid array and use the 2TB raid array for storage. However, this will leave a large chunk of the 1TB array unused and doesn't seem to be very efficient.

My question is, can I run LVM over the top of both arrays to arrive at a 3TB volume?

My fear with this is that I obviously need the volume to be bootable in case of a drive failing. Can anyone point me in the right direction and give some advice on whether it's possible, or any best-practice considerations? I'm a little overwhelmed with the information out there.



  • Matt, consider accepting the given answer if it helped you solve your issue. – vic Aug 18 '16 at 19:26

You can create several partitions on your first array. E.g. one for a system partition, one for a swap partition etc. and one partition for the LVM on the first array. On the second one you can create one big LVM partition or take the whole drive as a physical volume. Both LVM partitions (physical volumes) can then be combined into one LVM volume group.

The system partition is not affected by the LVM. I don't know much about software RAID configuration and how to boot from it. But the LVM is not a problem in that context because your system is on a normal partition.

  • Thanks @bmk, that's a helpful start, I'll give that a go and let you know how I get on. – Matt Apr 2 '11 at 9:07
  • That worked perfectly. 4 drives in 2xRaid 1 configurations, with LVM spanning some partitions between them. Also a breeze to set up with the Debian installer. Thanks for your help, bmk. – Matt Apr 4 '11 at 11:24

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.