Still puzzled by setup-storage

[Nicolas Courtel]

Michael Tautschnig a écrit :
>>> Ok, this will need some more experimental work I'm afraid. Could you try to do
>>> some manual steps and report back before we actually build this into
>>> setup-storage?
>>>
>>> On that particular host, I'd like to know how
>>>
>>> parted -s /dev/sda mklabel msdos
>>> parted -s /dev/sda mkpart primary ext3 512B 536871423B
>>> parted -s /dev/sda mkpart primary  536871424B 80026361855B
>>> parted -s /dev/sda set 1 boot on
>>> mkfs.ext3  /dev/sda1
>>> parted -s /dev/sda set 2 lvm on
>>> vgchange -a y vg0
>>>
>>> behaves in comparison to
>>>
>>> vgchange -a n vg0
>>> parted -s /dev/sda mklabel msdos
>>> parted -s /dev/sda mkpart primary ext3 512B 536871423B
>>> parted -s /dev/sda mkpart primary  536871424B 80026361855B
>>> parted -s /dev/sda set 1 boot on
>>> mkfs.ext3  /dev/sda1
>>> parted -s /dev/sda set 2 lvm on
>>> vgchange -a y vg0
>>>       
>> Apart from the extra output line, I can see no difference : in both
>> cases, the LVM volumes are back and active after the last vgchange.
>> Here's the full output of the second command list.
>>
>>     
>
> [...]
>
> Could you maybe do an explicit vgchange -a y vg0 beforehand? Somehow it should
> be possible to reprocduce the error that parted reports when doing, e.g., the
> second mkpart. That error was
>
> Error: Error informing the kernel about modifications to partition /dev/sda2 --
> Device or resource busy.
>
> in http://paste.debian.net/67978/.
>   
I had started lvm before running the commands, but it's not enough to 
reproduce the problem. I have also tried to run them after having 
stopped the installation, didn't work either.
I finally inserted the vgchange line in Commands.pm, it seems to have 
been run as expected, and the result is still an error that happens later.
The result is at http://paste.debian.net/68689/, and my (quite sloppy 
:-) ) patch is below:

--- Commands.pm.~1~     2010-04-13 13:32:32.000000000 +0200
+++ Commands.pm 2010-04-13 15:20:11.000000000 +0200
@@ -806,6 +806,7 @@
     or die "Can't change disklabel, partitions are to be preserved\n";
 
   # write the disklabel to drop the previous partition table
+    &FAI::push_command( "vgchange -a n vg0", "vg_created_vg0", 
"vg_disabled_vg0" );
   &FAI::push_command( "parted -s $disk mklabel $label", "exist_$disk",
     "cleared1_$disk" );

-- 
Nicolas
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