[Bug 16067] New: Can't set priority of volumes in LVM manager -- install

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Ubuntu | base-installer

           Summary: Can't set priority of volumes in LVM manager -- install
           Product: Ubuntu
           Version: unspecified
          Platform: Other
        OS/Version: other
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: base-installer
        AssignedTo: cjwatson at ubuntu.com
        ReportedBy: theosib at gmail.com
         QAContact: kubuntu-bugs at lists.ubuntu.com


I'm installing the daily build of Kubuntu as of 9/21.  I created a RAID0 out of partitions on three  
disks.  I then marked that as PV for LVM.  I also marked some free space on one of the drives as a PV  
for LVM.  
  
The problem is that there is no way to control the priority of the two PV's.  That is, I can only  
associate them in a set, but I cannot be sure that the LVM won't put the normal partition first.   
Naturally, what I want is for it to use the RAID first and then only when that fills should it spill  
over into the regular partition.  
 
There needs to be a way to control this. 
 
 
Aside:  when setting up RAID, do you make sure that the stride and block size are offset properly for 
whatever filesystem is being installed?  I understand that ext3 likes to space information evenly on the 
disk, and if that spacing is a multiple of the block size times the number of disks, you'll defeat the 
much of the point in using RAID0. 
 
Thanks.

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