I just tried to install CentOS 6.4 on an encrypted software RAID and LVM on top of it. After formatting for hours, the installation finally fails with the message that there is not enough space left and asks me if I want to file a bug report.
It appears that exactly one extent is "missing". It's really weird, because the setup itself computed these numbers. How can they be wrong??
Also very odd: When I rebooted and restarted the setup, the partitions I created in the previous run all seem to have shrunk. The 200 MB /boot partition is now displayed as 199 MB and the logical volume which failed to format appears to be exactly 4 MB smaller. So the "missing" extent is actually gone now.
Does anyone have an idea how this can be? Is it a bug in the setup routines or did I do something wrong?
Should I not encrypt the RAID, but the logical volumes instead?
Thanks in advance.
Side note: I had a similar problem with Ubuntu once (not involving encryption or LVM though), where the setup offered me x MB of free space and later failed, because the actual amount of available space was x - 1 MB. So this problem doesn't seem to be CentOS-specific.