RAID10 install with LVM doesn't work
| Affects | Status | Importance | Assigned to | Milestone | |
|---|---|---|---|---|---|
| Ubuntu |
Invalid
|
Undecided
|
Unassigned | ||
Bug Description
I tested the beta alternate Maverick (10.10) from CD and tried to create a RAID10 array with LVM. What happens is that the RAID10 array itself is correctly created and it shows the correct size ((N/2)*S). However when I try to create the LVM for this array it shows a size as if it were calculated from RAID5 size ((N-1)*S). So what the LVM shows is a *lot* bigger than the actual usable size for RAID10.
I also tried to use this incorrect size and create the LVM. It caused a serious lockup of the partitioner for all subsequent install attempts. So I was forced to take the Live CD and repartition with Disk Utility (also GParted crashed with Live CD).
I also tested RAID5. It worked correctly with correct sizes shown ((N-1)*S). Does the installer mix the RAID10 with RAID5?
| description: | updated |
| Olli Niemi (olliniem) wrote | #1 |
| Changed in ubuntu: | |
| status: | New → Invalid |
It seems the installer remembers the previous setup. I was testing with RAID5, removed the RAID setup, removed LVM and freed the disks so that they show "free space". This was not enough for the installer to detect it was not RAID5 anymore but RAID10 instead.
I got this working by using the Lucid alternate install CD and reconfigure the RAID10 from scratch. Now both Maverick and Lucid can see it is a RAID10 configuration. I also managed to install it to this configuration and boot from it.
This is probably not a big issue, you can close this report if you want.